While production on Avengers: Doomsday began in March 2025, Captain America: Brave New World’s Anthony Mackie recently shared that he made the trip to London several weeks into its filming. The actor was confirmed to return to the Marvel Cinematic Universe as Sam Wilson/Captain America following his first solo outing during Marvel’s five-and-a-half Avengers: Doomsday cast announcement. During the same video, it was confirmed that several actors from the 200s X-Men franchise would also return.

Posting to his Instagram story, Mackie shared a snap of himself on a flight to London captioned: “And so it begins…” The actor was clad in a Powerpuff Girls shirt with classic villains like Mojo Jojo and HIM on it. While not giving any explicit details about the movie itself, he did put a blood-splattered filter over the selfie, potentially hinting at its action-packed tone. Curiously, this implies that Mackie is only just starting to film his part in Avengers: Doomsday.

What Anthony Mackie’s Avengers: Doomsday Production Update Means

Captain America Is Just Beginning To Film His Scenes

Previously, stars such as James Marsden, Benedict Wong, and Ian McKellen were spotted on set, and Alan Cumming stated he was heading to film earlier this month. As a result, it’s a fair ᴀssessment that the Avengers and X-Men scenes may be filmed separately, at least to start. This tracks with the idea that the latter team will appear initially in their own separate universe, but no details are confirmed at this time. Notably, Mackie confirmed his interest in teaming up with several X-Men:

Look, I am a big Cyclops fan. That’s my favorite X-Men. I have a Cyclops action figure on my key chain that I’ve had since high school. When I was in high school, the X-Men cartoon was really big, and this was before the movies. I’ve always been a huge Cyclops fan, and I’m really, really excited – hopefully, knock on wood – for them to be a part of it and come into it. [I’m excited] to hang out with Xavier and Beast and all those guys. But my favorite is Nightcrawler. If I can hang out with one character? Me and Nightcrawler in the French Quarter during Mardi Gras for two weeks, that’s what I do.

Despite the differences in their filming schedules, Avengers: Doomsday could put Mackie’s Captain America opposite Cumming’s Nightcrawler and Marsden’s Cyclops. Mackie arriving later to set than the others does not mean they don’t share any scenes.

Our Take On Anthony Mackie’s Avengers: Doomsday Production Update

Captain America Will Be The Leader Of The Avengers

According to the end of Captain America: Brave New World, Sam will take a leadership role in reforming the Avengers, setting him up to have a substantial role in Avengers: Doomsday. Since he is ᴀssembling the team of heroes, antiheroes, and villains who will face Robert Downey Jr.’s Doctor Doom, he is poised to meet all kinds of multiversal characters.

Unfortunately, despite Mackie’s Powerpuff Girls attire, it’s significantly less likely Cap will be teaming up with Blossom, Bubbles, and ʙuттercup in Avengers: Doomsday. Humor aside, Mackie confirming that he’s arriving on set only further fuels the excitement and speculation as to what comes next for Sam.

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