Marvel Studios showed exclusive Avengers: Doomsday footage inside Hall H at San Diego Comic-Con on July 25, 2026, with studio chief Kevin Feige presenting the reel to a packed audience. The panel landed just days after Marvel released the first full Doomsday trailer to the public. The film is set for theatrical release on December 18, 2026 — a date it shares with the third instalment of a Warner Bros. sci-fi franchise, setting up a rare same-weekend collision between two event-scale titles. (Variety; Reuters)

The Hall H footage opens with Victor Von Doom — played by Robert Downey Jr. — seated on a throne. Sue Storm, played by Vanessa Kirby, narrates. She describes Doom as broken, says he used to be different, and states that everything he loved was taken from him. Pedro Pascal's Reed Richards then confronts Doom directly, asking whether he is responsible for the destruction of a city. (Variety)

Doom's reply to the assembled heroes is blunt: "All of you have lived stolen lives." The footage then shows Thor, played by Chris Hemsworth, charging at Doom — only for Doom to catch Thor's hammer mid-swing, toss it aside, shove Thor to the ground, and raise an army of sentinels from beneath the earth. (Variety)

The trailer's cast list reads like a Marvel crossover event sheet. Alongside Hemsworth's Thor, the footage includes Chris Evans as Captain America, Letitia Wright as Black Panther, Simu Liu as Shang-Chi, Tom Hiddleston as Loki, James Marsden as Cyclops, Ian McKellen as Magneto, and Channing Tatum as Gambit. The wider Doomsday ensemble, per Variety, unites four Marvel factions: the Avengers, the Fantastic Four, the Thunderbolts, and the Fox-era X-Men. (Variety)

The Avengers contingent includes Evans, Hemsworth, Paul Rudd, Sebastian Stan, Anthony Mackie, and Liu. The Fantastic Four are Pascal, Kirby, Joseph Quinn, and Ebon Moss-Bachrach. The Thunderbolts bring Florence Pugh, David Harbour, Wyatt Russell, Hannah John-Kamen, and Lewis Pullman. Crossing over from the Fox X-Men films are Patrick Stewart, McKellen, Marsden, Kelsey Grammer, Alan Cumming, Rebecca Romijn, and Tatum — the official MCU integration of characters Marvel regained when Disney acquired 20th Century Fox. (Variety)

Behind the camera, Anthony and Joe Russo — who directed Avengers: Infinity War and Endgame — are helming Doomsday and its follow-up, Avengers: Secret Wars, a commitment Marvel announced at Comic-Con 2024. (Marvel.com)

This is not the first look audiences have had at the film. Marvel released four teaser trailers in December 2025, spotlighting Evans' Captain America — now with a child — Thor and his daughter Love, the Fantastic Four meeting Black Panther and the Wakandans, and the first MCU appearance of the Fox X-Men team. A Thor-themed teaser followed on December 30, with Hemsworth's god of thunder praying to his late father Odin ahead of battle. (Variety; Deadline) An X-Men-focused teaser arrived in January 2026, featuring Stewart's Xavier, McKellen's Magneto, and Marsden's Cyclops. (Deadline) A further trailer debuted at CinemaCon in April 2026, showing Steve Rogers returning as the Avengers face what was described as their most formidable foe. (Deadline)

Tickets are already moving. Premium-format screen tickets went on sale early, and Marvel launched "Infinity Vision" tickets in connection with the Comic-Con footage debut. The Hollywood Reporter noted that the runtime is described as "epic," though Marvel indicated the final cut length was not yet settled. (Hollywood Reporter; Marvel.com)

For fans, the Hall H reel confirms the shape of the film: Downey Jr.'s Doom as the gravitational centre, pulling characters from across the Marvel catalogue into a single conflict. The line between hero and villain, if Sue Storm's narration is any guide, may not be as clean as the marketing has suggested.