Huge Avengers: Doomsday Casting Leak – Gym’s Social Media Post May Have Blown Big Marvel Secret!

It seems Daredevil actor Charlie Cox may have inadvertently confirmed his involvement in Avengers: Doomsday, thanks to an unexpected source—a gym buddy.

A screenshot from the Daredevil TV series – Disney+

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Speculation began after someone at Cox’s gym posted an Instagram story showing the actor alongside a congratulatory caption referencing Avengers: Doomsday. Although the post was swiftly deleted, screenshots spread like wildfire across social media, igniting a frenzy among Marvel fans.

The Instagram post came from DFRNT Health and Fitness. In the post, Cox is pictured alongside his wife and two of the gym’s trainers. 

Charlie Cox is reportedly preparing to reprise his role as Daredevil in ‘AVENGERS: DOOMSDAY’:

“Charlie is currently training for his role in the upcoming Marvel Avengers movie where he will play Daredevil.”

(Source: dfrnt.hq | Instagram) pic.twitter.com/6pFRf3HG9Y

— MCU Film News (@MCUFilmNews) December 30, 2024

“It’s been awesome having Charlie and his wife, Sam Cox, in DFRNT over the past few weeks,” the post reads. “Charlie is currently training for his role in the upcoming @marvel Avengers movie where he will play @daredevil. It’s been our absolute pleasure working with you both and we can’t wait to watch you on the big screen!”

Cox has been the subject of intense speculation ever since his Daredevil revival in Spider-Man: No Way Home and later She-Hulk: Attorney at Law on Disney+. He’ll take the lead role of Daredevil once more in the upcoming Disney+ series Daredevil: Born Again. The beloved actor’s portrayal of the blind vigilante has earned him a devoted fan base, with many hoping he would make the leap from Netflix’s The Defenders to the Marvel Cinematic Universe’s (MCU) grander stage in a more substantial theatrical role.

This gym-based mishap seems to suggest that those hopes may finally be realized.

Charlie Cox as Matt Murdock and Elden Henson as Foggy Nelson in Daredevil (2015), Marvel Entertainment

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While Marvel Studios is famously secretive, Cox’s involvement in Avengers: Doomsday wouldn’t come as a complete shock.

With Daredevil reintroduced to the MCU and Avengers: Doomsday likely set to showcase an all-hands-on-deck scenario to rival Infinity War and Endgame, Cox’s inclusion feels almost inevitable. However, the timing of this apparent slip-up is certainly awkward, as Marvel often prefers to save casting announcements for high-profile events like San Diego Comic-Con or D23 Expo. In recent history, Marvel purposely hides major casting surprises entirely from promotional material to generate big fan reactions live in the theater. 

This was specifically done with Cox in Spider-Man: No Way Home. 

Adding to the intrigue, Cox has been unusually tight-lipped in interviews about his Marvel commitments beyond Born Again. When pressed for details about future appearances, he’s often deflected questions with vague answers or playful smirks. Fans now see these responses as potential hints that the actor was keeping a major secret all along.

Tobey Maguire as Peter Parker, Tom Holland as Peter Parker, and Andrew Garfield as Peter Park in Spider-Man: No Way Home (2021), Marvel Studios

The implications of Daredevil appearing in Avengers: Doomsday are significant, making this a landmark casting for Marvel. The street-level hero has typically operated in the shadows, dealing with local threats in New York City rather than galactic or multiversal crises. Including him in such a large-scale event could signal a new chapter for the character, possibly aligning him with other prominent heroes like Spider-Man, who shares his gritty urban backdrop.

Over the years, Marvel Studios has gone to extreme lengths to avoid leaks, from using codenames on scripts to spreading misinformation even among the cast. Yet, time and again, minor slip-ups from external sources—whether they be toy manufacturers, merchandise leaks, or now a gym acquaintance—continue to reveal details ahead of schedule. A major Avengers: Doomsday casting leak would be a huge embarrassment to Marvel and Disney.

(L-R): Charlie Cox as Daredevil/Matt Murdock and Tatiana Maslany as She-Hulk/Jennifer “Jen” Walters in Marvel Studios’ She-Hulk: Attorney At Law, exclusively on Disney+. Photo by Chuck Zlotnick. © 2022 MARVEL.

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It’s no secret that fans have been far less enthusiastic about Marvel’s recent outings since Avengers Endgame. The company’s embrace of identity politics has turned off many fans and led to diminished box office returns. However, Cox’s Daredevil is still a beloved figure and the Netflix series he starred in is hailed by many as one of the best things Marvel has ever done. 

(L-R): Ryan Reynolds as Deadpool/Wade Wilson and Hugh Jackman as Wolverine/Logan in 20th Century Studios/Marvel Studios’ DEADPOOL & WOLVERINE. Photo by Jay Maidment. © 2024 20th Century Studios / © and ™ 2024 MARVEL.

It’s possible that involving Cox once more as Matt Murdock/Daredevil could reignite nostalgia and fan excitement, similar to what was recently seen with Ryan Reynolds and Hugh Jackman in Deadpool & Wolverine. 

What do you think of this rumored Avengers: Doomsday casting? Was this just an innocent mistake by a gym acquaintance, or did we just get confirmation of one of Marvel’s best-kept secrets? Are you excited to potentially see Charlie Cox as Daredevil in an Avengers film? Let us know your thoughts and theories in the comments below!

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