The first teaser trailer for Marvel's 'Avengers: Doomsday' is expected to be released soon, possibly attached to the upcoming 'Avatar: Fire and Ash' film, which premieres next week. A Korean media ratings board listed a 1-minute 25-second trailer, sparking anticipation for its release. The film is scheduled for theatrical release on December 16, 2026, and is set to be the central film of Phase 6, replacing the previously planned 'Kang Dynasty.' 'Avengers: Doomsday' will feature an unprecedented alliance of the Avengers, Thunderbolts, Fantastic Four, and X-Men to confront the villain Doctor Doom, played by Robert Downey Jr., alongside other major stars. The film marks a shift in Marvel’s storyline focus from Kang the Conqueror to Doctor Doom due to legal issues involving actor Jonathan Majors. The movie is part of a broader MCU timeline that includes 'Spider-Man: Brand New Day' in July 2026 and leads up to 'Avengers: Secret Wars' in 2027, which will conclude Phase 6. Notably, some key characters like Captain Marvel and Scarlet Witch are absent from the cast, raising questions about their future roles. Fans are eagerly awaiting the trailer and more details about this major Marvel event.