[Speculative Analysis] Will 'Avengers: Doomsday' Be the Film That Integrates Three Worlds?
Predicting the collision and reorganization of three worlds: Earth-616, the Fantastic Four, and the X-Men.
There are not many clues officially provided at this point regarding 'Avengers: Doomsday,' which is scheduled for release on December 18, 2026.
However, one quite significant sentence has been released.
According to the official description, in this film, heroes from three different universes head toward a catastrophic collision.
Furthermore, the announced cast includes not only heroes currently active in the MCU, but also characters from the Fantastic Four and the original 'X-Men' film series.
From here on is speculation, but I believe 'Doomsday' will be a film where
Earth-616
the world of the Fantastic Four
the world of the X-Men
—these three universes collide, and in the end, Doctor Doom forcibly integrates them.
Doom may not necessarily appear just as an enemy who destroys the world.
He presents a way to save the crumbling worlds, and as a result, attempts to stand at the center of a new order.
If that is the development, it fits both the character of Doctor Doom and the connection to 'Secret Wars'.
What are the three universes?
The official side has not revealed the names of the three universes.
However, judging by the composition of the cast, it is most logical to consider them Earth-616, the world of the Fantastic Four, and the world of the X-Men.
The current Avengers, New Avengers, Wakanda, and Talokan are on the Earth-616 side.
The Fantastic Four come from a separate world with its own history and culture.
Professor X, Magneto, Cyclops, Beast, Nightcrawler, and others will appear as characters from a separate world with the lineage of the original 'X-Men' films.
It is hard to imagine these three factions getting along from the start.
As the official description uses the word 'collision,' it is likely that each world will prioritize its own survival and view other worlds as enemies.
To save one world, another must be sacrificed.
If Doom appears in that situation claiming, 'I can save them all,' it would be easy to place him at the center of the story.
The F4 have already arrived at the doorstep of Earth-616.
In the post-credits of 'Thunderbolts*,' the New Avengers, 14 months after the main story, discover a spaceship approaching from another dimension.
On the hull, there is a large '4' mark.
At the very least, a ship with the '4' mark has not existed on Earth-616 for a long time.
It has just arrived from another universe.
It is natural to assume that the F4 themselves are on the ship, but the interior of the ship is not shown in this scene.
Even so, if we view this as a lead-in for the F4 to join from another world, the question of 'what were the F4 doing' during the past Battle of New York, Sokovia, and Thanos's invasion does not arise.
That is because they were in a different world at the time.
What is more concerning is why they left their home to come to Earth-616.
Is their home universe already beginning to collapse?
Are they chasing Doom?
Did they come seeking help?
Or do they believe that Earth-616 is the cause of their own world's destruction?
The arrival of the F4's spaceship might not just be a meeting scene, but an alarm for an Incursion.
It is difficult to make the X-Men 'have been in 616 all along'.
Regarding the X-Men as well, I think it is more natural for them to come from another universe.
If mutants and the X-Men had been active on Earth-616 for a long time, it would raise major questions about all the past films.
What were they doing when aliens invaded New York?
What were they doing when Sokovia floated into the sky?
What were they doing when Thanos's army came to Earth?
Why didn't the existence of mutants become a social issue even after half the world's population vanished?
Furthermore, it would mean that S.H.I.E.L.D., Hydra, and Wakanda never once grasped the existence of people with powerful abilities and a massive school.
One could explain it by saying, 'Professor X kept them hidden with telepathy.'
However, in that case, they would be a team that stayed hidden no matter how many times the world fell into crisis.
It would even make the X-Men look bad.
Therefore, it is easier to organize if the original X-Men characters appear as residents of another world and are settled into a new world after 'Secret Wars'.
The gateway to the X-Men was already created in 'The Marvels'
At the end of 'The Marvels', Monica Rambeau was left behind in another universe.
There, she found Binary, a version of Maria Rambeau from another world, and Beast, played by Kelsey Grammer.
In other words, the MCU has already prepared...
Carol and Kamala wanting to save Monica
↓
heading to another universe
↓
making contact with the X-Men
a straightforward gateway.
With this narrative path, the story progresses not 'to introduce the X-Men,' but 'to save Monica.'
Since it enters the multiverse through character emotions, it is easy for the audience to follow.
It cannot be confirmed at this time whether the original X-Men characters appearing in 'Doomsday' are from the same world as the one Monica is in.
However, if it is the same world, Monica will become a key figure connecting Earth-616 and the X-Men world.
If it is a different world, it would mean there are multiple X-Men worlds, making the story even more complicated.
Will America Chavez Not Appear?
The most concerning point here is America Chavez.
In 'Doctor Strange in the Multiverse of Madness,' Wanda tried to steal her powers, and Strange and his allies risked their lives to protect her.
Chavez opens star-shaped portals that lead directly to other universes.
And at the end of the film, she had begun training at Kamar-Taj to control her abilities.
In 'Doomsday,' where multiple universes collide, there is no one more suitable for the job.
Heading to the world where Monica is.
Connecting the F4's home to Earth-616.
Evacuating people from collapsing worlds.
Doom targeting her abilities.
There are endless narrative roles that could be created for her.
Yet, as of August 3, 2026, the name of Xochitl Gomez, who plays Chavez, is not on the official cast list.
There is a possibility that she is being kept hidden as a surprise appearance.
On the other hand, perhaps a travel agent is unnecessary because the worlds are approaching each other on their own due to incursions.
Alternatively, the TVA or Loki might handle all the travel and exposition.
However, it would be quite a waste if they move between worlds using only convenient devices, without utilizing a character they went to such lengths to protect and develop.
Will Doom Destroy the World, or Will He Save It?
In the 2015 comic 'Secret Wars,' a patchwork world called 'Battleworld' is created from the fragments of the collapsed multiverse.
The ruler of that world is Doctor Doom, who has obtained god-like powers.
The MCU is not necessarily going to adapt that same flow exactly as it is.
Considering the versions of Doom depicted in past live-action films, it is risky to assume he will suddenly appear as the 'savior of the world'.
However, since 'Secret Wars' is slated to follow 'Doomsday', the collision and reorganization of worlds is a natural prediction.
It is possible that Doom will not appear as a simple destroyer, but rather demonstrate a way to preserve parts of the world amidst the collision of multiple universes.
However, that would not be a selfless salvation.
Might it not include Doom himself deciding the order of the new world and standing at its pinnacle?
The flow I am imagining is as follows.
Incursions progress across three universes.
↓
If one is saved, the others vanish.
↓
Heroes clash as they try to protect their own worlds.
↓
Doom demonstrates a way to save fragments of multiple worlds.
↓
Fragments of the worlds are merged into one.
↓
People survive, but Doom seizes control of the new world order.
In this case, Doom is not a simple invader.
At the very least, he himself might believe his actions are 'salvation' rather than 'domination'.
Only I could have saved this world.
Standing at the top with that kind of logic is more unsettling than simply aiming for world conquest.
And 'Secret Wars' will not just be a film about defeating Doom, but a story about choosing whether to destroy or keep the world he created.
If the worlds are merged, inconsistencies can be sorted out once and for all.
Reorganizing the world is a drastic measure.
However, it is also a method that would be effective for the current MCU.
In the new world, the Avengers, F4, and X-Men exist on the same Earth.
However, it is not a case of 'they were actually there all along'.
They will coexist as a result of history itself being rewritten through 'Doomsday' and 'Secret Wars'.
That way, the problem of the X-Men being absent during past Earth crises, or the problem of the F4 not existing, can be avoided.
The actors from the old X-Men films can be used as a bridge until the world is reorganized, after which a new generation of X-Men can begin.
It should be noted that there is no original comic book titled 'Avengers: Doomsday'.
The specific story of the film is expected to be essentially unique to the MCU.
However, the development where multiple universes collide is close to 'Time Runs Out,' which was depicted in the original 'Avengers' and 'New Avengers' comics.
Furthermore, the composition of Doom gathering fragments of collapsed worlds to rule over a new world is consistent with the 2015 version of 'Secret Wars'.
In other words, 'Doomsday' may not be a direct adaptation of any single work, but rather a unique MCU prequel that bridges the gap between 'Time Runs Out' and 'Secret Wars'.
Doom will not be neatly folding up three separate cloths.
He will cut them all up and sew them into one giant cloth.
It is quite a drastic measure, but perhaps that is the kind of radical treatment the current MCU needs.
The more this prediction seems likely, the greater the anxiety becomes.
With this concept, the title 'Doomsday' also takes on meaning.
It is not the day Doom destroys the world, but the day Doom changes the shape of the world.
However, if the film is to cover the introduction of three universes, their collision, Doom's plan, and the integration of the worlds all in one go, that alone would be a significant amount of information.
The current MCU also has many characters and settings left over from other works.
Before uniting the worlds, can they organize the world inside the audience's heads?
The more interesting this prediction looks, the greater the anxiety about whether it can all fit into one film.
In the next article, I will organize the reasons why I cannot have high expectations for 'Doomsday,' despite the star-studded cast.
Main sources
The Walt Disney Company, 'Marvel Studios Stuns San Diego Comic-Con with ‘Avengers: Doomsday,’ ‘Ghost Rider,’ and ‘Black Panther 3’ Reveals,' July 25, 2026
The Walt Disney Company, 'Walt Disney Studios Wows CinemaCon Attendees at 2026 Gathering in Las Vegas,' April 16, 2026
Marvel.com, 'Watch the ‘Avengers: Doomsday’ Teaser Trailers,' January 13, 2026
TIME, "The Thunderbolts Post-Credits Scene Sets Up Fantastic Four," May 2, 2025
Entertainment Weekly, "The Marvels ending and post-credits scene, explained," November 10, 2023
Marvel.com, "Stephen Strange’s Hello and Goodbye to the Love of His Life, Christine Palmer," May 18, 2022
Marvel.com, "Avengers: Time Runs Out"
Marvel.com, "Secret Wars and Battleworld Explained," July 29, 2022
Information verification date: August 3, 2026
*The "identity of the three universes," "world integration by Doom," and "role of Chavez" are the author's predictions based on released works and official announcements.