Disney+ published a list of essential titles to walk into Doomsday prepared. We reproduce it as-is, tickable from your Marathon progress, then add what the official list left out.
The film that launched the modern superhero era, and the Fox cast Doomsday brings back: Xavier, Magneto, Cyclops, Mystique.
The peak of the Fox trilogy, and the Xavier / Magneto dynamic Doomsday builds on.
Steve Rogers' origin. And the Tesseract, the first stone everything else is built on.
The team comes together. The benchmark Doomsday will be measured against.
Thanos, the template for the unifying villain Doom now inherits.
Time travel cracks reality open: without this film, no multiverse.
The TVA, Variants and the Sacred Timeline: the multiverse crash course you cannot skip.
The Ten Rings and the signal they send somewhere else. A thread still hanging.
The first big live-action universe collision, and the rules of the multiverse game.
Incursions, the Illuminati and an Earth-838 that shows what a multiversal collapse costs.
The new Panther, and a Wakanda that will weigh on the coming conflict.
Loki at the end of the timeline tree: the exact state of the multiverse going into Doomsday.
The Void, the TVA from the other side, and the bridge between the Foxverse and the MCU.
Sam Wilson as Captain America, and an adamantium find that redraws the geopolitical map.
The team actually answering the call now, and where the post-Endgame Avengers stand.
The First Family, Doom's sworn enemies. The most direct doorway into Doomsday.
The first live-action Doom. Not canon in any way, but the comparison is worth it.
Kelsey Grammer's first turn as Beast. He returns to the role in Doomsday.
The film that unites both X-Men casts and resets the timeline.
The anthology that establishes the Watcher and how parallel universes work.
The Council of Kangs, and the vacant throne Doom steps into.
The most debated omission: its post-credits scene sends Monica to another universe, face to face with Beast.
Disney+ recommends 15 titles: X-Men, X2, Captain America: The First Avenger, The Avengers, Infinity War, Endgame, Loki, Shang-Chi, Spider-Man: No Way Home, Doctor Strange in the Multiverse of Madness, Black Panther: Wakanda Forever, Deadpool & Wolverine, Captain America: Brave New World, Thunderbolts* and The Fantastic Four: First Steps.
Roughly 42 hours for the 15 official titles. Marathon computes how much you actually have left, subtracting everything you have already ticked.
Disney+ puts X-Men (2000) and X2 (2003) on the list because several of those actors return in Doomsday: Patrick Stewart, Ian McKellen, James Marsden, Alan Cumming, Rebecca Romijn and Kelsey Grammer.
It is the omission fans debate most: its post-credits scene sends Monica Rambeau into an alternate universe where she meets Beast. Odyssey 616 adds it back under “The omissions”.
16 December 2026 internationally, 18 December in the United States.