X-Men Go

Where Did the Fox X-Men Go? The Tragic Endgame Encore Theory Behind Doomsday’s Missing Mutants

Professor X is in. Magneto is in. But where are Storm, Rogue and Jean Grey? A new theory built on the Avengers: Endgame Encore re-release offers an answer, and it's…

September 29, 2026
3 min read

Professor X is in. Magneto is in. But where are Storm, Rogue and Jean Grey? A new theory built on the Avengers: Endgame Encore re-release offers an answer, and it’s heartbreaking.

X-Men Go Snapshot

DetailInfo
FilmAvengers: Doomsday
ReleaseDecember 18
VillainDoctor Doom (Robert Downey Jr.)
Theory sourceThe Direct (fan-style analysis, not confirmed)
Key clueNew post-credits footage in Endgame Encore
Core ideaRepeated universe “incursions” wiped out several mutants

The Clue in Endgame Encore

The re-release reportedly includes new footage setting up Doomsday. In one post-credits scene, the TVA watches an incursion between Earth-10005, the designated home of the Fox-era X-Men, and a new reality called Earth-1127. Each world fires missiles at the other, since the only known way to survive is to destroy the opposing Earth first. Roughly 3,000 realities then begin colliding, and a TVA agent concludes the Multiverse is collapsing.

X-Men Go

Why That Could Explain the Missing Heroes?

If the Fox universe survived several incursions, casualties would be unavoidable. The Direct points to Doomsday footage that supports this: the X-Men teaser showed Xavier’s school in ruins, and the trailer showed Xavier gazing at a burning red sky, a classic comic-book sign of an incursion. Xavier and Magneto also calmly play chess amid the chaos, which suggests they’ve faced this before.

There’s a caveat. The exact timeline these X-Men come from is still unconfirmed, and they might even belong to the unnamed world glimpsed in The Marvels post-credits scene, where Kelsey Grammer’s Beast appeared.

Who’s In and Who’s Out?

ConfirmedNot confirmed or absent
Patrick Stewart (Professor X)Famke Janssen says she isn’t returning as Jean Grey
Ian McKellen (Magneto)Shawn Ashmore says he wasn’t invited back as Iceman
James Marsden (Cyclops)Halle Berry (Storm), Anna Paquin (Rogue), Elliot Page (Kitty Pryde), Vinnie Jones (Juggernaut) unconfirmed
Alan Cumming (Nightcrawler)Hugh Jackman and Ryan Reynolds remain rumors
Kelsey Grammer (Beast)
Rebecca Romijn (Mystique)
Channing Tatum (Gambit)

What Have the Russos Said?

Anthony Russo declined to answer specifics about Jean Grey, Storm and Rogue, but said the X-Men’s history feeds into the movie in a meaningful way. Joe Russo added that there are always more surprises. That isn’t confirmation of the theory, so treat it as speculation until the film arrives.

Follow the road to Doomsday in our Marvel movie news and MCU theory coverage on Technosports. For background, read about the X-Men on Wikipedia.

FAQs

Q1. Why are some Fox X-Men missing from Doomsday?
One theory says earlier universe incursions wiped them out. It’s unconfirmed.

Q2. Which X-Men are confirmed for Doomsday?
Professor X, Magneto, Cyclops, Nightcrawler, Beast, Mystique and Gambit.

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