Avengers: Doomsday Spoilers Leak — Doctor Doom, X-Men & a Collapsing MCU Timeline?

The wait for Marvel’s next major crossover may feel long, but Avengers: Doomsday spoilers are already leaking — and they hint at a wild ride through the multiverse. The film, set to hit theaters on December 18, 2026, will be the first big Avengers story since Endgame, and it’s shaping up to be epic.

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A New Avengers Story Without Kang

Originally titled The Kang Dynasty, the movie has since pivoted after Marvel parted ways with Jonathan Majors. Now, instead of Kang, the story reportedly focuses on the Avengers themselves causing multiverse-level damage — through time travel, dimension-hopping, and reality-breaking decisions we’ve seen in past films like No Way Home and Multiverse of Madness.

What’s the Threat?

According to leaks from Marvel insider Alex Perez, the multiverse is unraveling due to growing incursions — dangerous overlaps between universes. One major collision involves Earth-616 (the main MCU timeline) and the X-Men universe where Monica Rambeau is stranded.

Another intriguing detail? The MCU might still be stuck in a time loop, repeating a cycle designed by “He Who Remains,” where a multiversal war is inevitable. That could explain why Doctor Strange only saw 14,000,605 futures in Infinity War — and why things keep falling apart.

Enter Doctor Doom?

With Kang out, all eyes are now on Doctor Doom, rumored to be played by none other than Robert Downey Jr. as a variant. If true, it would be a major twist and a bold move by Marvel to tie the multiverse chaos to a familiar face with a dark edge.