Guarded Avengers Doomsday reveal at D23 amid on set rumors

Marvel Studios offered a guarded glimpse of its next blockbuster as Avengers Doomsday continues filming in London, unveiling a sizzle reel at D23 and drawing renewed attention to casting, production changes and circulating on-set rumors ahead of the film's December 18, 2026 release. The Russo brothers called the project their most ambitious to date, while cast members praised the scale of the sets and the film's sprawling ensemble.

At the Walt Disney Studios presentation, attendees saw a montage of past MCU moments and a behind-the-scenes video rather than new finished footage from Doomsday, according to people at the event. In a prerecorded message from the London set, directors Joe and Anthony Russo said, "This movie is, to say the least, a big one for us. It is bigger than anything we have ever done. We are bringing together so many of your favorite heroes to face one of the greatest threats to the MCU." Paul Rudd, who returns as Ant-Man, added in the video, "We're surrounded by jaw-dropping sets and some truly incredible talent."

The film reunites a broad cross-section of Marvel properties. Robert Downey Jr. will appear as Doctor Doom, a move that shocked and excited fans...