"Avengers: Doomsday" to end the Multiverse Saga and launch a new MCU era

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As movie theaters prepare for their sites to be crashed by Marvel fans trying to buy Avengers: Doomsday tickets, one chain has posted a brand-new synopsis.

The new Doomsday synopsis, as per Fandango, 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."

The new description is just cryptic enough, but it reinforces the notion that Doomsday will mark the end of the MCU as we know it and usher in a new age for Marvel cinema. The "threat" in question is seemingly referring to Doctor Doom, played by Robert Downey Jr. But just as Spider-Man: Brand New Day is keeping its villain under lock and key, we suspect Doomsday has something else up its sleeve other than Downey's green-suited baddie.

The upcoming Avengers movie is set to bring back a whole stack of Marvel heroes, from the original Fox-era X-Men, many of whom will be making their MCU debut, to Chris Hemsworth's Thor and Chris Evans' Steve Rogers. A few newbies have made the cut too, such as The Fantastic Four, who will be traveling in from their respective timelines after Doom paid a visit to Reed and Sue's baby. This explains the "three distinct universes" part of the synopsis.

However, the final line, teasing a new era for the MCU, all but confirms what we feared most. That Doomsday will say goodbye to the heroes we know and love to make room for new faces. Many believe the new movie is bringing back Patrick Stewart's Professor X, Ian McKellen's Magneto, and more, just to kill them off. This would make sense, as Marvel is due to introduce a new line of younger mutants in Thunderbolts director Jake Schreier's upcoming X-Men reboot.

The new synopsis has landed just days before Marvel is set to return to Hall H at San Diego Comic-Con 2026, two years after it was revealed in that very room that Iron Man star Downey would return as Doom. Marvel will have to pull something truly spectacular out of the bag this year to beat that, meaning the studio should at least release the first Doomsday trailer. See our SDCC 2026 wishlist for the other announcements we're hoping to see at San Diego Comic-Con.

Tickets for Avengers: Doomsday are set to go on sale the morning of Monday, July 20, for the first two weeks of Infinity Vision showings.

Doomsday arrives this December 18. For more on Marvel Phase 6 , check out our guide to all the upcoming Marvel movies and shows .