UPDATE: Nearly 24 hours later, Marvel still hasn’t issued takedowns β and some fans now think the silence means the leak is fake or AI.
Spoiler warning: this article describes unverified leaked footage from Avengers: Doomsday.
It didn’t take long. Days after bootleg Spider-Man: Brand New Day trailers hit social media, Avengers: Doomsday sprang its own leak, and this one is the big one fans have been waiting on.
Over the past 24 hours, a roughly 72-second clip from Avengers: Doomsday has been circulating heavily on X, pixelated, soundless, and watermarked, but widely believed by outlets and scoopers to be the real thing rather than an AI fake.
It’s the first wide look at footage from a movie whose only full trailer has been locked behind CinemaCon since April. The footage also offers the clearest look yet at Robert Downey Jr.’s much-hyped Doctor Doom costume in action. Until now, fans had been stuck decoding the Russos’ green teases while waiting on the only full trailer locked behind CinemaCon since April.
And if it’s legit, it appears to show the exact moment the cast has spent the last week teasing.
What’s In The Leaked Footage
Per descriptions making the rounds, the clip opens with Robert Downey Jr.’s Doctor Doom activating a force of Sentinels β the giant mutant-hunting machines pulled straight from X-Men lore β as Chris Hemsworth’s Thor and Chris Evans’ Steve Rogers prep for battle.
It reportedly closes with James Marsden’s Cyclops firing an optic blast as a Sentinel unloads.
Other elements being described across the leaks include Nightcrawler, Gambit, and Mystique scrambling into the fight, plus a large team-assembly shot that fans are already comparing to the camera circling the heroes in 2012’s The Avengers β only far bigger this time.
Energy effects, smoke, destruction: a full crossover melee.
That lines up cleanly with Disney’s official synopsis, which frames Doomsday as three universes on a deadly collision course. The leak, if real, is the synopsis in motion: Avengers, X-Men, and Fantastic Four in the same frame for the first time.
Is This The “Mythical Moment” The Cast Teased?
Here’s where it connects to what we recently covered.
David Harbour recently told Variety he watched a “mythical Marvel sequence” get filmed β the moment a character does the iconic thing you’ve seen before β and refused to say what it was. Variety‘s writer guessed Thor catching his hammer. We flagged that as the journalist speculating, not Harbour confirming.
Now some leak descriptions claim the footage shows Steve Rogers wielding Mjolnir, which would tie directly into long-running worthiness rumors and Harbour’s tease.
Worth being clear, though: that specific beat is among the least verified parts of the leak.
The clips confirm Rogers and Thor are in the battle together; “Cap catching the hammer” is so far an interpretation of blurry footage, not something anyone has cleanly shown. File it under compelling-but-unconfirmed.
Is The Leak Real?
That’s the question everyone’s asking, and the honest answer is: probably, but not confirmed.
Several outlets that have reviewed the clip believe it’s authentic and not AI-generated, and scooper Daniel Richtman has called related leaks β including a Wolverine, Spider-Man, and Deadpool photo β “100% real.”
It also aligns with prior set photos and the CinemaCon trailer descriptions, which adds credibility.
But we’re in an era where convincing fakes take minutes to make, Marvel has said nothing official, and the footage is rough enough that a lot of the “details” are people filling blurry gaps with what they want to see.
How We Got Here β And What’s Still Coming
This isn’t a one-off. Reports point to a much larger breach reportedly including a full trailer, a poster, more than a dozen unseen photos, and behind-the-scenes footage, meaning today’s clip may be the first drip, not the flood.
It’s the predictable cost of Marvel’s rollout strategy.
The studio dropped four teasers starting last December, then showed the only full trailer exclusively to CinemaCon attendees in April and sat on it. Months of public hunger plus a finished cut equals exactly this. Expect Marvel to scrub these clips fast, as it always does.
Avengers: Doomsday opens Dec. 18, 2026. For everything confirmed, rumored, and leaked, see our full Avengers: Doomsday news and updates guide.
