The Avengers: Doomsday trailer has given Marvel Cinematic Universe fans have plenty to pick apart, which is another way of saying the frame-by-frame detective department has reopened for business. After Marvel Studios unveiled the first proper look at the film, viewers quickly zeroed in on one group shot that they believe has been digitally cleaned of a few inconvenient people.

The trailer offered the first real look at Robert Downey Jr. as Doctor Doom, along with several superhero teams appearing to unite against him. The Avengers, the New Avengers and the Fantastic Four are all seen coming together, but fans think the staging looks oddly spacious in places. In Marvel trailer language, empty space is rarely treated as just empty space. How relaxing for everyone involved.

Why fans think characters were removed from the shot

The shot under inspection appears to show multiple teams gathering before they make a major move in the story. Some fans argue there are visible gaps between characters, especially around the Fantastic Four, that look less like dramatic blocking and more like someone was erased in post-production.

The leading theory is that Doctor Doom himself may have been cut from the trailer version of the scene. That idea fits a broader fan suspicion that Doom could first present himself as an ally or mysterious hero in the multiverse chaos, only to betray the assembled heroes once he has won their trust.

Several fans also pointed to Steve Rogers as a possible missing figure. One viral theory claims the scene may happen before the heroes head to the X-Mansion, where Doom’s true loyalties could be revealed. That is still speculation, but Marvel has trained audiences to distrust its trailers with the dedication of a studio that knows exactly what it is doing.

Which secret characters could Marvel be hiding?

Doctor Doom is the obvious candidate, but he is not the only one. The film already has a wide cast, and several roles still unknown or unconfirmed.

The possibilities fans are floating include:

  • Loki, who is known to be in the film, though Marvel has not clarified how he fits into the story.
  • Thor, if the movie is saving a reunion between the brothers for the theater.
  • Spider-Man, especially if Marvel wants to avoid spoiling anything from Spider-Man: Brand New Day.
  • Doctor Strange, whose multiverse experience would make him a fairly useful person to have in the room.
  • Captain Marvel, another major player who has not been ruled out by fan speculation.
  • The Eternals, because apparently no corner of the MCU is too complicated to reopen.

None of these possibilities has been confirmed. The point, for fans, is not that one specific answer is obvious. It is that the composition of the shot looks suspicious enough to invite the usual Marvel math.

Marvel has done this before

The suspicion is not coming out of nowhere. Marvel Studios has a long history of editing trailers to protect story turns, disguise character appearances or simply mislead viewers until opening weekend.

The most famous recent example is Spider-Man: No Way Home, where footage was altered to hide Andrew Garfield and Tobey Maguire before their returns were officially revealed on screen. The Avengers: Infinity War trailer also included the Hulk running into battle in Wakanda, a moment that never actually happens in the finished movie. That same campaign also adjusted shots of Thanos’ gauntlet to hide how many Infinity Stones he had collected.

The Avengers: Endgame trailers used similar tricks, including shots of Captain America with an intact shield to avoid revealing later battle damage. More recently, trailers for Thunderbolts and The New Avengers reportedly played with footage involving a specific character to obscure their early death in the final film.

So when fans see a strange gap in a major team-up shot, they are not exactly inventing paranoia from scratch. Marvel built the lab.

The Steve Rogers theory is also gaining traction

The trailer has also revived another theory involving Chris Evans’ Steve Rogers. Fans noticed that the Steve shown in this new footage appears bearded and has longer hair, while a previous teaser showed a Steve Rogers who was clean-shaven, with shorter hair, living peacefully with a baby.

That contrast has led some viewers to wonder whether the new trailer’s Steve is not the same version at all. One theory suggests this could be an antagonistic variant, possibly even a take on Hydra Cap from the comics. If true, it would give Evans a very different final MCU turn, assuming this is indeed another farewell.

Again, Marvel has not confirmed any of this. But the idea fits the trailer’s larger mood, where universes are colliding, familiar faces may not mean familiar loyalties, and the safest assumption is that nobody is having a simple day.

What Marvel has confirmed about the story

Alongside the trailer, Marvel also released a new Avengers: Doomsday poster that hints at Doctor Doom’s motivation. The studio is still keeping much of the plot guarded, but the official synopsis makes clear that the film is intended as a major turning point for the franchise.

The description reads: “Universes collide and the Multiverse Saga begins its final chapter in Marvel Studios' Avengers: Doomsday. Beloved heroes from three distinct universes will be set on a deadly collision course and ultimately face an existential threat unlike anything they've ever encountered. This epic film will lay the foundation for the future of the Marvel Cinematic Universe.”

That framing confirms the movie is not just another crossover. It is being positioned as the beginning of the end for the Multiverse Saga, with heroes from three separate universes drawn into the same crisis.

Avengers: Doomsday is scheduled to arrive in theaters on December 18, 2026. Until then, fans will keep inspecting every suspiciously empty patch of trailer space, because Marvel has made that an unofficial part of the viewing experience.