Avengers: Doomsday teaser will reportedly be shown during Avatar 3 screenings in December

According to The Hollywood Reporter, the first teaser for Avengers: Doomsday will be shown during Avatar: Fire and Ash, also known as “Avatar 3”, screenings in December 2025. This is a great way to market their movie as it can generate a lot of hype for one of the most anticipated movies in the Marvel Cinematic Universe (MCU). Smartly using the enormous audience of James Cameron’s blockbuster movie is a good and strategic marketing plan.  

With a release date of December 18, 2026, Avengers: Doomsday is expected to be a historic film event that unites heroes from the Marvel Cinematic Universe, including the Avengers, X-Men, Fantastic Four, and Wakanda. The plot involves multiple universes, and fans can expect the comeback of many beloved characters and also includes new characters like Gambit.

This movie is considered the biggest movie of the MCU that will involve fast-paced action sequences, strong storylines and a lot of drama. By giving fans their first glimpse of this historic crossover, the teaser may set the ground for an amazing Phase Six finale.

But it's crucial to remember that nothing is verified. The official release date of the teaser has not been disclosed by either 20th Century Studios or Marvel Studios. One of the most discussed details is the potential reappearance of Robert Downey Jr. as Victor von Doom—Doctor Doom himself—instead of Tony Stark. By including him, the Marvel Cinematic Universe would undergo a significant sea change and establish him as a key character for the franchise's future.

Avengers: Doomsday - Release Date and Production

A first look teaser at ‘AVENGERS: DOOMSDAY’ is reportedly attached to ‘Avatar 3’ screenings in December.

(Via: @DanielRPK) pic.twitter.com/uFvQSx29sw

— The Hollywood Handle (@HollywoodHandle) October 2, 2025

The release date of Avengers: Doomsday is set for December 18, 2026. Production on the film, which was directed by Anthony and Joe Russo, started in April 2025 at Pinewood Studios in the UK and includes shooting in Bahrain. To ensure an epic cinematic experience, Alan Silvestri returned to create the score, and Michael Waldron and Stephen McFeely co-wrote the script.

Avengers: Doomsday - Cast and Characters

A stellar cast from throughout the MCU appears in the movie. Chris Hemsworth's character Thor, Captain America played by Sam Wilson or Anthony Mackie, Bucky Barnes played by  Sebastian Stan, Black Panther/Shuri presented by  Letitia Wright,  Paul Rudd as Ant-Man, and Robert Downey Jr as Doctor Doom, are among the main returning heroes.

The representation of the Fantastic Four also includes Namor, played by Tenoch Huerta Mejía, Ben Grimm, played by Ebon Moss-Bachrach, and Sue Storm, played by Vanessa Kirby.

Fans of the X-Men world can anticipate visits from Nightcrawler, who is played by Alan Cumming,  James Marsden as Cyclops,  Rebecca Romijn as Mystique, Professor Xavier, who is depicted by Patrick Stewart, and Magneto, played by Ian McKellen. Channing Tatum plays Gambit, and other recent recruits offer new life and the possibility of crossover plots.

Avengers: Doomsday - What is the expected storyline?

The storyline remains under wraps, but it is anticipated that the plot will revolve around a threat that spans multiple universes, bringing heroes from various realms together. According to speculation, Doctor Doom—possibly a multiverse version of the character—could be a significant threat.

Following its release in 2026, Avengers: Doomsday is poised to revolutionize the future of the MCU with its enormous cast and multiverse stakes.

Stay tuned for further updates!