Rumors of a possible delay in the production of Avengers: Secret Wars have sparked worry among fans of the Marvel Cinematic Universe. Reports suggest that filming for the final installment of the Multiverse Saga, which was expected to begin last month, may now start in early 2027, likely in January. These claims have been confirmed by multiple sources familiar with the MCU, including Daniel Richtman, Alex Perez, and Apocalyptic Horseman. While Marvel has not officially commented on the revised schedule, there is uncertainty about whether the film's current release date—December 15, 2027—will remain unchanged. The principal filming for Avengers: Doomsday took place from April to September 2025, with some additional scenes shot recently before its December release. Marvel has over a year to complete most of the post-production work, which is a longer timeline than what was used for Spider-Man: Brand New Day, which was filmed between August and December 2025 for a July 2026 release. Secret Wars is expected to be more complex, with a larger cast and a more intricate storyline. There are still many unanswered questions, including the exact start date of filming for Secret Wars and whether Marvel has already collected footage to be used in the film during the production of Doomsday. This technique was used in previous Marvel films, such as Avengers: Infinity War and Endgame, to streamline the production process. While it is possible that the release date could be pushed to 2028, that would affect the schedules of other upcoming Marvel projects, including X-Men, Ghost Rider, and Black Panther 3. Directors Joe and Anthony Russo have suggested that Avengers: Doomsday will have a "thrilling and focused narrative" with a surprising ending. Fans have had mixed reactions to the potential delay, with some expressing concern over the timeline and others seeing it as an opportunity for actors to promote Doomsday this winter. The delay, if confirmed, could provide additional time for marketing and preparation, but it also adds uncertainty to the future of the Marvel Cinematic Universe.