Avengers: Doomsday Clock Countdown Teaser Unleashed by Russo Brothers

The Russo Brothers have officially kicked off the Avengers: Doomsday countdown.

On Thursday — the same day the first Avengers: Doomsday teasers begin playing in theaters with Avatar: Fire and Ash — Joe and Anthony Russo released a countdown teaser for Marvel’s next Avengers event film.

Countdown Points to December 18, 2026

The teaser features a ticking clock counting down 12 months, lining up exactly with Avengers: Doomsday’s theatrical release date of December 18, 2026.

The timing makes it clear Marvel is now fully entering the marketing phase, using controlled teases to build momentum after months of leaks and speculation.

View this post on Instagram

A post shared by The Russo Brothers (@therussobrothers)

Two Character Teasers Already Leaked

So far, two character-focused teasers from the rollout have already leaked online.

The first confirms Chris Evans returning as Steve Rogers, showing him arriving home on a motorcycle and holding a baby, suggesting his post-Endgame life plays a central role in the story.

The second teaser centers on Chris Hemsworth’s Thor, depicting him alone in the woods praying to Odin before battle. The trailer ends by confirming both Thor and Loki will return in Avengers: Doomsday.

Also, what is claimed to be the Avengers: Doomsday X-Men music has leaked online.

Leaks:

Primeras imágenes del teaser trailer de #AvengersDoomsday #MarvelStudios

‘Steve Rogers volverá.’ pic.twitter.com/OOQrTKVUxS

— TDK 🐦🍿🎄🎁❄️ (@lozanoTDK80s) December 15, 2025

Full Avengers Doomsday Thor Teaser Audio

Enjoy#AvengersDoomsday pic.twitter.com/6usYnxWXE4

— Men See Men Happy (@SazzNomads) December 17, 2025

AVENGERS DOOMSDAY X MEN THEME

WE ARE EATING GOOD pic.twitter.com/5Jsl7oU7Ps

— Doom’s Servant (@lakersspammer) December 18, 2025

Serialized Teasers Are Now Underway

The countdown video reinforces reports that Marvel is rolling out multiple short character teasers rather than a single traditional trailer.

Robert Downey Jr.’s Doctor Doom is expected to headline the third teaser, with a possible fourth character-focused reveal teaser also getting released, all leading into a fifth and final teaser — the full trailer for Avengers 5, Doomsday.

With the clock now active and teasers already leaking, it’s clear the studio is positioning Avengers: Doomsday as a long-form event leading into its 2026 release.

Avengers: Doomsday Release Info

Avengers: Doomsday will be released in theaters on December 18, 2026.

The confirmed cast includes Chris Evans, Chris Hemsworth, Anthony Mackie, Sebastian Stan, Paul Rudd, Letitia Wright, Florence Pugh, Simu Liu, Tom Hiddleston, Wyatt Russell, David Harbour, Winston Duke, Danny Ramirez, Hannah John-Kamen, Pedro Pascal, Vanessa Kirby, Joseph Quinn, Ebon Moss-Bachrach, Patrick Stewart, Ian McKellen, Alan Cumming, Rebecca Romijn, James Marsden, Kelsey Grammer, Channing Tatum, Tenoch Huerta Mejía, Lewis Pullman, and Robert Downey Jr.