Guide
Avengers: Doomsday Plot Theories — Ranked
Marvel has revealed almost nothing about Avengers: Doomsday (December 18, 2026). So the fans have. From the Doom-as-Stark-variant theory grounded in confirmed MCU lore, to the question of whether the heroes might deliberately let Doom win — here are the six biggest plot theories, ranked from most grounded to most speculative.