Robert Downey Jr. has shared a new behind-the-scenes image from the set of Marvel’s Avengers: Doomsday. He is seen reading Jeremy Renner’s new book My Next Breath during a filming break.
On Instagram, Downey Jr. shared the image and wrote, “Reading Renner’s book and feeling stronger already… what a journey to wisdom… very instructive… a must-read!” See the image below.

This image might be a major spoiler for Downey Jr.’s look as Victor Von Doom. In the photo, he flexes his muscles, and in the background, we can see a costume change van with a poster on it that reads, “Do Not Knock, Trust Yourself.”
Here’s the plot details for Avengers: Doomsday:
Avengers: Doomsday will mark the beginning of the end of the Marvel Cinematic Universe (MCU). As the multiverse nears total collapse, the Avengers assemble to face their biggest challenge yet—incursions, catastrophic collisions between realities that could destroy the entire multiverse. Earth’s Mightiest Heroes must race against time to save their reality while confronting the powerful figure behind it all—Victor Von Doom (Downey Jr.).
Directed by Russo brothers from a screenplay by their longtime collaborator, Stephen McFeely. Newton Thomas Sigel (Bohemian Rhapsody, X-Men: Days of Future Past) will be the cinematographer.
The official cast members of the film include Downey Jr. as Doctor Doom, Paul Rudd as Ant-Man, Simu Liu as Shang-Chi, Tom Hiddleston as Loki, Florence Pugh as Yelena Belova, Danny Ramirez as Falcon, Sebastian Stan as Bucky Barnes, Winston Duke as M’Baku, Chris Hemsworth as Thor, Letitia Wright as Black Panther, Tenoch Huerta Mejía as Namor, Anthony Mackie as Captain America, David Harbour as Red Guardian, Wyatt Russell as U.S. Agent, and Hannah John-Kamen as Ghost. Ian McKellen as Magneto, Patrick Stewart as Professor X, Rebecca Romijn as Mystique, James Marsden as Cyclops, Kelsey Grammer as Beast, Alan Cumming as Nightcrawler, and Channing Tatum as Gambit. Pedro Pascal as Reed Richards (Mr. Fantastic), Vanessa Kirby as Sue Storm (Invisible Woman), Joseph Quinn as Johnny Storm (Human Torch), Ebon Moss-Bachrach as Ben Grimm (The Thing), and Lewis Pullman as Sentry.
Recently, on The Hot Mic podcast, Jeff Sneider revealed an unannounced cast list for Avengers: Doomsday, which reportedly includes Mark Ruffalo (Bruce Banner/Hulk), Benedict Wong, Brie Larson, Hayley Atwell, Don Cheadle, Karen Gillan, Jeremy Renner, Iman Vellani, Danai Gurira, Tessa Thompson, Ke Huy Quan, Teyonah Parris, Will Poulter, Dominique Thorne, Xochitl Gomez, Sophia Di Martino, Tatiana Maslany, Yahya Abdul-Mateen II (Wonder Man), Kathryn Newton, Wunmi Mosaku, Lashana Lynch, Famke Janssen, Halle Berry, Kai Zen Aspilla, Owen Wilson, Chris Pratt, Samuel L. Jackson, Charlize Theron, Benedict Cumberbatch, Chris Evans, Bradley Cooper, Vin Diesel, and Maria Bakalova.
Produced by Kevin Feige, Louis D’Esposito, and Russo Brothers will produce through their AGBO banner.
Avengers: Doomsday hits theaters on May 1, 2026.
Source: RDJ/Instagram