The Marvel Cinematic Universe just got a little wilder. Ryan Reynolds’ mercenary with a mouth, Deadpool, is officially joining Avengers: Doomsday, the next big installment in the MCU’s Phase 6 slate. Fans have long speculated about how Deadpool’s chaotic energy could fit into the epic world of the Avengers, and now Marvel has confirmed it’s happening, though with a twist.
Deadpool will appear in the film, but he won’t officially be an Avenger. Instead, the “fourth-wall-breaking” antihero will maintain his usual irreverent outsider status, navigating the Avengers’ universe on his own chaotic terms. Reynolds teased that the character will “do what Deadpool does best” without being weighed down by team duties or heroic moral codes per cosmic book.
The film, set for a December 18, 2026 release, is shaping up to be a blockbuster gathering of Marvel heavyweights. Alongside Deadpool, Robert Downey Jr. will make a shocking return, this time as the villainous Doctor Doom. The lineup also includes X-Men favourites, with James Marsden reprising Cyclops, and a host of returning MCU icons.
Fans are particularly excited about how Deadpool’s humour will contrast with the high-stakes drama of the Avengers saga. The character’s self-aware jokes, meta-commentary, and penchant for chaos promise to bring a fresh, unpredictable energy to the film. Marvel insiders hint that the script leverages Deadpool’s unique voice to both poke fun at and complement the traditional superhero narrative.
While Deadpool has appeared in previous solo films and a small cameo in Doctor Strange in the Multiverse of Madness, this is his first major crossover into the core Avengers story. It marks a bold step in Marvel’s ongoing multiverse strategy, blending R-rated humour with blockbuster spectacle.
With Avengers: Doomsday, Marvel seems determined to shake up the formula while keeping fans on the edge of their seats. Deadpool’s involvement ensures that the next chapter of the MCU will be as unpredictable as it is epic.
