If you are building a marvel watch list for doomsday, the preparation for Avengers: Doomsday is no longer just about revisiting the original Avengers movies. Marvel’s next giant crossover is bringing together multiple generations of MCU heroes, the Fantastic Four and legacy X-Men characters, while Robert Downey Jr. returns to the franchise as the villainous Doctor Doom. With the movie scheduled to arrive in theaters on December 18, 2026, there is still time to work through the most important stories without attempting to watch the entire MCU.
The scale of Doomsday has become clearer as Marvel has revealed more footage and information. The movie is being directed by Anthony and Joe Russo, the filmmakers behind Avengers: Infinity War and Avengers: Endgame, and its ensemble includes Chris Hemsworth, Chris Evans, Anthony Mackie, Pedro Pascal, Vanessa Kirby, Florence Pugh, Sebastian Stan, Channing Tatum, Patrick Stewart, Ian McKellen and many other returning stars.
Recent promotional material has also emphasized Doctor Doom’s threat and the collision between Marvel’s different generations of characters. That makes the right preparation list more important than ever.
Key Points Summary
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║ – Avengers: Doomsday is scheduled to arrive in U.S. theaters on December 18, 2026. ║
║ – The most important preparation titles include Avengers: Endgame, Loki, Doctor Strange in the Multiverse of Madness, Deadpool & Wolverine and The Fantastic Four: First Steps. ║
║ – The original X-Men movies have become more relevant because several major Fox-era X-Men actors are returning for Doomsday. ║
║ – Thunderbolts and Captain America: Brave New World help establish the MCU’s current generation of heroes. ║
║ – Spider-Man: Brand New Day is the latest major MCU-connected movie to watch before the December crossover. ║
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Why Avengers: Doomsday Requires a Special Watch Order
The film is not simply another sequel to Avengers: Endgame. It brings together characters from different corners of Marvel’s cinematic history, including heroes from the current MCU, the Fantastic Four and the legacy X-Men universe.
That creates several different story threads for audiences to follow.
The first is the continuation of the Avengers story after Endgame. The second is the multiverse storyline that developed through projects such as Loki, Spider-Man: No Way Home and Doctor Strange in the Multiverse of Madness. The third involves the arrival of the Fantastic Four. The fourth is the return of characters from the earlier X-Men films.
There is also the enormous question of Doctor Doom.
Robert Downey Jr., who spent more than a decade defining Tony Stark and Iron Man, is now playing Victor von Doom. That casting choice gives Doomsday an unusual connection to the MCU’s past while establishing an entirely new threat.
1. Avengers: Endgame Should Be Your Starting Point
If you only have time for one traditional Avengers movie, make it Avengers: Endgame.
The 2019 blockbuster concluded the Infinity Saga and brought the original Avengers era to an emotional turning point. Steve Rogers, Tony Stark, Thor, Bruce Banner, Natasha Romanoff and Clint Barton all reached major points in their respective stories.
The movie is particularly important because Doomsday brings several pieces of that previous era back into the spotlight.
Chris Evans is returning to the MCU, Chris Hemsworth remains part of the new Avengers story, and the larger legacy of the original team hangs over the upcoming film.
Endgame also establishes the emotional weight behind the MCU’s transition from its original heroes to a newer generation.
2. Watch Avengers: Infinity War Before Endgame
Although Endgame is the more obvious choice, watching Avengers: Infinity War immediately beforehand makes the story considerably stronger.
Infinity War establishes the massive scale of a Marvel crossover and shows the Avengers, Guardians and other heroes facing a threat that extends across the universe.
It also introduces the idea that a Marvel event can bring together characters who previously operated in separate storylines.
That is useful preparation for Doomsday, which is taking the crossover concept even further.
3. Loki Season 1 Is Essential Multiverse Preparation
The Disney+ series Loki is one of the most important pieces of homework for anyone interested in Marvel’s multiverse.
The first season introduces the Time Variance Authority and explores alternate timelines, variants and the instability created when established events are changed.
Tom Hiddleston’s Loki is also part of the wider Doomsday story, making his Disney+ journey more significant than a typical side project.
The show helps explain why the MCU’s current reality is not necessarily a single straightforward timeline.
4. Loki Season 2 Takes the Multiverse Story Further
Season 2 is arguably even more valuable when preparing for the upcoming Avengers movie.
The second season explores the consequences of the TVA’s problems and Loki’s increasingly important role in preserving the multiverse.
Without getting too deep into spoilers, the season dramatically changes Loki’s place in the MCU and provides a broader understanding of how Marvel’s timelines can interact.
Watching both seasons together is therefore strongly recommended.
5. Doctor Strange in the Multiverse of Madness
Doctor Strange’s second solo adventure should be high on any Doomsday preparation list.
The movie introduces audiences to multiple realities, alternate versions of familiar characters and the concept of incursions. These ideas are important because the MCU’s Multiverse Saga is increasingly concerned with what happens when separate realities collide.
Doctor Strange is also one of Marvel’s most important multiverse characters, making his previous adventures valuable background even when a specific storyline does not directly lead into Doomsday.
6. Spider-Man: No Way Home
Spider-Man: No Way Home is another essential multiverse chapter.
The movie brings together multiple versions of Spider-Man and demonstrates how characters from different realities can exist within the same larger story.
It also established a major precedent for Marvel and Sony: familiar actors and characters from previous franchises can return without simply erasing their original histories.
That concept becomes especially important when considering the return of the Fox-era X-Men cast in Doomsday.
7. Deadpool & Wolverine Is One of the Biggest Priorities
For fans preparing for Doomsday, Deadpool & Wolverine is arguably the most important post-Endgame movie to revisit.
Ryan Reynolds’ Deadpool and Hugh Jackman’s Wolverine are placed directly inside a multiverse story involving the TVA and characters from previous Marvel movies.
The movie also celebrates Marvel’s pre-MCU cinematic history rather than treating those films as irrelevant.
That makes it particularly useful preparation for a film that features returning X-Men actors such as Patrick Stewart, Ian McKellen, James Marsden, Alan Cumming and Rebecca Romijn.
8. X-Men Introduces the Legacy Mutant Characters
The original X-Men from 2000 is worth revisiting before Doomsday.
The movie establishes Professor X, Magneto, Wolverine, Mystique and the central conflict between mutants and humans.
For longtime fans, seeing these characters return in a new Marvel crossover is one of the biggest attractions of Doomsday.
It also gives newer MCU viewers a better understanding of why the return of actors such as Stewart and McKellen has generated so much interest.
9. X2: X-Men United
X2 develops the original mutant team and deepens the relationships among Professor X, Magneto and Wolverine.
It is not necessary to watch every X-Men movie before Doomsday, but X2 gives additional emotional and character context to the original franchise.
Fans who want to understand the history behind the returning X-Men actors should consider it part of the extended watch list.
10. X-Men: Days of Future Past
If you only choose one X-Men movie besides X-Men and Deadpool & Wolverine, Days of Future Past is probably the best option.
The film revolves around time travel and changing the course of history. As a result, it provides one of the clearest examples of how Marvel’s older cinematic universe can contain different versions of events.
That makes its themes especially relevant to a multiverse crossover.
The movie also features several of the actors connected with the legacy X-Men lineup.
11. Logan Gives Wolverine More Emotional Context
Logan is not strictly required to understand the plot of Doomsday, but it provides important context for Hugh Jackman’s Wolverine.
The film presents a dramatically different stage of Logan’s life and became one of the most acclaimed interpretations of the character.
Because Wolverine’s return is such a major part of Marvel’s modern multiverse strategy, revisiting Logan can add emotional weight to his continued presence.
12. The Fantastic Four: First Steps Is Essential
The Fantastic Four are among the most important additions to the modern MCU.
Pedro Pascal plays Reed Richards, Vanessa Kirby plays Sue Storm, Joseph Quinn plays Johnny Storm and Ebon Moss-Bachrach plays Ben Grimm.
Their introduction gives viewers the necessary background for understanding this version of Marvel’s First Family.
It is also particularly important because Doctor Doom has historically been one of the Fantastic Four’s defining enemies.
Watching The Fantastic Four: First Steps before Doomsday therefore makes the conflict between Doom and the wider Marvel heroes easier to appreciate.
13. Thunderbolts Establishes the New Avengers Era
The post-Endgame MCU has gradually been assembling a new generation of heroes and antiheroes.
Thunderbolts is an important part of that transition.
Florence Pugh’s Yelena Belova, Sebastian Stan’s Bucky Barnes, Wyatt Russell’s John Walker and Lewis Pullman’s Bob Reynolds are among the characters associated with the movie.
The film gives audiences a better sense of where the MCU’s current superhero landscape stands before the arrival of its biggest crossover in years.
14. Captain America: Brave New World
Anthony Mackie’s Sam Wilson officially carries the Captain America legacy into a new phase of the MCU.
Captain America: Brave New World is therefore useful background for understanding the modern Avengers lineup and Sam’s position within it.
It also continues the story of characters and political developments that emerged from earlier Captain America movies.
For viewers who have not followed the post-Endgame MCU closely, it helps bridge the gap between the old Avengers era and the newer team.
15. Black Panther: Wakanda Forever
Black Panther: Wakanda Forever is another useful addition to the extended list.
The film develops Shuri’s role as Black Panther and introduces Namor to the MCU.
Both the Wakandan side of Marvel and characters connected to that corner of the universe are increasingly important as the MCU moves toward larger crossover events.
16. Spider-Man: Brand New Day
The latest Spider-Man movie should also be considered part of the current preparation lineup.
Spider-Man: Brand New Day places Peter Parker in a new chapter of his life following the events of No Way Home. Sony’s official synopsis describes a Peter operating in a world that does not remember him, while he faces a new threat.
Because it is the newest major Spider-Man adventure released before Doomsday, watching it gives fans the most current picture of Tom Holland’s Peter Parker.
However, viewers should distinguish between confirmed connections and fan theories. Not every plot element in Brand New Day necessarily has a direct role in Doomsday.
The Best 10-Title Watch List
For viewers who want the shortest practical preparation marathon, this is the recommended order:
- Avengers: Infinity War
- Avengers: Endgame
- Loki Season 1
- Loki Season 2
- Doctor Strange in the Multiverse of Madness
- Spider-Man: No Way Home
- Deadpool & Wolverine
- X-Men: Days of Future Past
- Thunderbolts
- The Fantastic Four: First Steps
Add Spider-Man: Brand New Day afterward for the most up-to-date Spider-Man context.
The Ultimate Watch Order for Hardcore Marvel Fans
Those who want a longer preparation marathon can add:
- Iron Man
- The Avengers
- Captain America: The Winter Soldier
- Avengers: Age of Ultron
- Captain America: Civil War
- Thor: Ragnarok
- Avengers: Infinity War
- Avengers: Endgame
- Loki Seasons 1 and 2
- Doctor Strange in the Multiverse of Madness
- Spider-Man: No Way Home
- X-Men
- X2: X-Men United
- X-Men: Days of Future Past
- Logan
- Deadpool & Wolverine
- Captain America: Brave New World
- Thunderbolts
- The Fantastic Four: First Steps
- Spider-Man: Brand New Day
This gives fans a much broader understanding of the characters and franchises converging in the next Avengers event.
Why Doctor Doom Is the Center of Everything
The biggest reason to revisit the Marvel universe is the arrival of Doctor Doom.
Robert Downey Jr.’s casting means audiences will see an actor most strongly associated with Tony Stark step into the role of one of Marvel Comics’ most famous villains.
Doom is not simply another superpowered antagonist. In Marvel Comics, he is closely tied to the Fantastic Four, Reed Richards and the broader concept of reality-threatening conflicts.
That makes The Fantastic Four: First Steps particularly important, while the previous Avengers movies establish the emotional history of the heroes who will have to confront him.
How the X-Men Change the Equation
The return of legacy X-Men actors makes Doomsday different from previous Avengers movies.
Patrick Stewart’s Professor X and Ian McKellen’s Magneto are among the most recognizable characters from the earlier Marvel movie era. James Marsden’s Cyclops, Alan Cumming’s Nightcrawler and Rebecca Romijn’s Mystique add even more continuity to the legacy X-Men side.
For audiences who grew up with those films, Doomsday represents more than another superhero crossover. It is also a meeting point between different eras of Marvel filmmaking.
Do You Really Need to Watch Everything?
Absolutely not.
Marvel has produced an enormous amount of content, and trying to consume every movie and Disney+ series before Doomsday can make the experience unnecessarily complicated.
The strongest approach is to focus on the stories that explain the Avengers, multiverse, Fantastic Four, X-Men, Wolverine, Spider-Man and Doctor Doom.
If time is limited, prioritize Endgame, Loki, Multiverse of Madness, No Way Home, Deadpool & Wolverine, Days of Future Past, Thunderbolts and The Fantastic Four: First Steps. Then add Spider-Man: Brand New Day for the latest chapter.
When Is Avengers: Doomsday Releasing?
Avengers: Doomsday is currently scheduled for an exclusive theatrical release on December 18, 2026.
The film is directed by Anthony and Joe Russo and is expected to serve as one of the central events of Marvel’s Phase Six. It will eventually be followed by Avengers: Secret Wars, currently scheduled for December 17, 2027.
With new footage already generating significant attention and the film’s enormous ensemble now established, Marvel is clearly positioning Doomsday as one of its biggest cinematic events.
Final Takeaway
The ideal preparation for Avengers: Doomsday is not a complete MCU marathon. Instead, build your viewing around the stories that explain how Marvel arrived at its current multiverse era.
Start with the original Avengers legacy through Infinity War and Endgame. Move into the multiverse with Loki, Doctor Strange in the Multiverse of Madness and No Way Home. Then watch Deadpool & Wolverine and selected X-Men movies to understand the return of Marvel’s legacy mutants. Finish with Thunderbolts, The Fantastic Four: First Steps and Spider-Man: Brand New Day to catch up with the current MCU.
That combination should provide enough context to recognize the major characters, understand the multiverse setup and appreciate the significance of Doctor Doom when Marvel’s next massive crossover reaches theaters.
Which Marvel movies are you watching before Avengers: Doomsday? Share your must-watch picks and keep checking back for the latest updates as Marvel’s biggest crossover gets closer.