Chris Hemsworth Had A Message For Robert Downey Jr After Marvel Announced Some 'But Not All' Of The Avengers: Doomsday Cast

Just when Marvel fans thought they had it all figured out, Chris Hemsworth may have added more fuel to the upcoming Avengers: Doomsday fire. After Marvel’s 5.5-hour chair reveal stream that unveiled a sprawling roster of returning and new Avengers, fans were still left speculating, despite Thor being the very first name revealed. Now, the Transformers One voice star’s birthday message to his former co-star is reigniting buzz about what’s coming in the upcoming Marvel movie.

In a recent post shared to his official Instagram stories, Hemsworth wished Robert Downey Jr. a happy 60th birthday with a striking and adorable collage of photos of the two actors together across the years, showing the Furiosa actor and Downey looking like MCU royalty. But the real news was in the caption. The Australian-born performer wrote:

This definitely seems like a tease, and comes after Kevin Feige confirmed more casting was coming, and that the list included "many of the cast members, but not all who joined the film." Fans are curious about Thor's role in the blockbuster, and Hemsworth seems to be hinting at his return.

Hemsworth posted a bunch of fun photos from their time working together. One of my favorites is the awesome pic of him, RDJ, and Chris Evans, which he originally shared on X (formerly Twitter) a while back. They shared that memorable snap while doing press for Avengers: Age of Ultron.

Needless to say, this immediately set off Marvel fans across the internet.

Why? Because even though the Ghostbusters alum was technically the first name announced during the now-infamous livestream, many fans somehow missed it — or had forgotten by Hour 5 — and the emoji-laced birthday post reignited fresh speculation and excitement. Downey made the cut. The Thunderbolts* cast mates Florence Pugh and David Harbour made the cut, though they didn’t know they were in the movie until the reveal. Paul Rudd’s Ant-Man and a hilarious tiny director's chair were there. But who else? What other megastars might make the cut?

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Yes, Hemsworth was technically the first name revealed—but let’s be real: in a five-and-a-half-hour hype marathon, even a literal god can get lost in the shuffle. Fans quickly revisited the stream footage after his post went viral—adding fuel to the question: is he teasing something more, or was this just a sweet, nostalgic moment between co-stars?

Given the carefully worded "We'll see you soon" and the particular use of the lightning bolt and hammer emojis, I’m leaning toward the former. And honestly, can you blame me? Marvel’s track record with post-credits surprises, multiversal curveballs, and sudden character resurrections has everyone conditioned to treat every emoji like it’s part of the official Marvel Multiverse timeline plan.

Avengers: Doomsday is set to hit theaters on May 1, 2026, so there’s still plenty of time for surprise announcements. We already know that not every cast member has been revealed yet. It makes sense for Hemsworth’s Thor to return, especially since it will have been more than four years since we last saw the Asgardian god on the big screen by the time the film is released.

Marvel fans will have to wait to see if this was a subtle wink at something more or just a genuine birthday toast. Whatever it is, it worked. The internet’s spinning its hammer again, checking every post and the tea leaves for any news about the upcoming superhero movie.

Until Marvel reveals more casting news (hopefully not another five hours of livestream content), all we can do is keep our eyes on the skies—and Chris Hemsworth’s Instagram.