Avengers: Doomsday premieres on December 18, 2026: official information, release date, and fakes

Avengers: Doomsday is the fifth film in the Avengers saga within the Marvel Cinematic Universe (MCU) and is part of Phase 6. Its release is confirmed for December 18, 2026, in the United States and most international markets.

Since its announcement, the film has generated strong expectations, but also a significant amount of confusion due to fake trailers, manipulated leaks, and content created with artificial intelligence. This article brings together only official and verified information available up to December 2025.

Official information about Avengers: Doomsday

The film is directed by Anthony Russo and Joe Russo, who return to the MCU after Infinity War and Endgame.

The script is written by Michael Waldron and Stephen McFeely, while production is handled by Marvel Studios alongside AGBO, the Russo brothers’ company.

The main villain will be Doctor Doom (Victor von Doom), portrayed by Robert Downey Jr. Marvel confirmed that this is a completely new character, with no connection to Iron Man or Tony Stark.

Confirmed general plot

The story brings together several key groups from the MCU:

• The current Avengers
• Wakanda
• The Fantastic Four
• The Thunderbolts, presented as New Avengers
• The original X-Men team

The core of the conflict revolves around the multiverse, collisions between realities, and the official integration of characters that previously belonged to Fox into the MCU.

Cast confirmed by Marvel

The cast was officially revealed in March 2025 through a Marvel livestream that broke audience records. Confirmed actors include:

• Chris Hemsworth (Thor)
• Anthony Mackie (Sam Wilson / Captain America)
• Vanessa Kirby (Sue Storm)
• Pedro Pascal (Reed Richards / Mister Fantastic)
• Simu Liu (Shang-Chi)
• Florence Pugh (Yelena Belova)
• Letitia Wright (Shuri)
• Paul Rudd (Ant-Man)
• Tom Hiddleston (Loki)
• Patrick Stewart (Professor X)
• Ian McKellen (Magneto)

In total, the film will feature more than 26 confirmed main actors.

Official teasers: what actually exists

Until late 2025, Marvel had only shown theater-exclusive teasers. However, this changed today with the release of the first official online teaser for Avengers: Doomsday.

The teaser was published on Marvel’s official YouTube channel and publicly confirms the release date, set for December 18, 2026. Unlike the teasers shown exclusively in cinemas, this material is available to the general public and serves as a direct confirmation of the film’s official schedule.

The teaser maintains a restrained approach, without revealing extended action scenes or key plot details. Its main purpose is to establish the title, the overall tone of the project, and the release date, making it clear that this is official material.

With this release, Marvel puts an end to much of the confusion caused by fake trailers and unverified content that circulated on social media for months.

Production and project changes

The official announcement of the title, directors, and the inclusion of Doctor Doom took place during San Diego Comic-Con 2024.

At that event, Marvel also confirmed the abandonment of the Kang storyline following the legal issues involving Jonathan Majors.

Filming began in April 2025 and concluded in September 2025.

The issue of fake trailers and AI

Since late 2024, a large amount of fake content related to the film has circulated, including:

• Full trailers created with AI
• Cinema leaks mixed with edited footage
• Fake images of Doctor Doom with non-official designs
• Unfounded rumors, such as theories linking him to Iron Man

This situation caused confusion, as the real teaser has a subtle and minimalist tone, very different from the fan-made trailers circulating online.

Marvel responded by actively removing this content to protect the theatrical release.

Where to follow reliable information

Marvel recommends following information only through:

• The official Marvel website
• San Diego Comic-Con announcements
• The official cast reveal livestream
• Theater-exclusive teasers
• The official Russo Brothers account

Official countdown