Josh Brolin is officially reprising his role as Thanos in Marvel Studios’ Avengers: Secret Wars, the highly anticipated conclusion to the Multiverse Saga set for release on May 7, 2027. The news, first reported by industry outlets in late 2025 and confirmed through multiple production sources, marks the return of one of the MCU’s most iconic villains after his apparent death in Avengers: Endgame (2019). While details remain limited, the announcement has ignited widespread speculation about Thanos’ role in the film—particularly whether he will stand alongside Robert Downey Jr.’s Doctor Doom or emerge as a separate force in the multiversal conflict.
Brolin’s return was first hinted at during Marvel’s 2025 San Diego Comic-Con panel, where a brief post-credits tease from Avengers: Doomsday showed a shadowy purple figure with the unmistakable Infinity Gauntlet silhouette. The image, though brief, sparked immediate fan theories. Subsequent reports confirmed that Brolin had been in talks since early 2025, with filming scheduled to begin in mid-2026 under directors Anthony and Joe Russo. The actor’s involvement was kept under wraps until contract finalization, but sources indicate he has already completed motion-capture sessions and voice work for key scenes.
Thanos’ inclusion in Secret Wars makes narrative sense within the film’s comic-inspired framework. The 2015 Secret Wars event featured a multiversal Battleworld ruled by Doctor Doom, where heroes and villains from across realities were pitted against one another. In the MCU adaptation, Doom (played by Downey) is positioned as the central antagonist, using the multiverse’s chaos to reshape reality in his image. Thanos’ return could serve multiple purposes: a multiversal variant (an alternate-timeline Thanos who survived or never lost the Infinity Stones), a resurrected version pulled through the multiverse, or even a spectral echo of the original Titan. Whatever form he takes, his presence raises immediate questions about alliances.
The biggest unknown is Thanos’ relationship with Doom. In the comics, Doom and Thanos have crossed paths but rarely allied; their egos and goals often clash. Doom seeks godlike control through intellect and sorcery, while Thanos pursues balance through destruction. Reports suggest Marvel is deliberately keeping Thanos’ allegiance ambiguous to preserve suspense. He could appear as an independent threat, forcing heroes to confront multiple cosmic-level dangers. Alternatively, he might form a temporary truce with Doom—perhaps believing Doom’s plan aligns with his own vision of balance—or actively oppose him, creating a three-way conflict between the Avengers, Doom’s forces, and Thanos’ lingering army. Some insiders speculate a variant Thanos could even become an uneasy ally to the heroes if Doom’s actions threaten the very concept of balance he once sought.
Brolin’s performance as Thanos remains one of the MCU’s most celebrated villain turns. His motion-capture work brought depth and tragedy to the character, transforming a comic-book titan into a complex figure driven by philosophy rather than pure evil. In Infinity War and Endgame, Thanos was both terrifying and sympathetic—a genocidal conqueror who believed he was saving the universe. Reintroducing him in Secret Wars allows Marvel to explore new facets: perhaps a Thanos who never completed the snap, one who succeeded in a different timeline, or one who has evolved after defeat. Brolin’s physical commitment—hours in the mo-cap suit—and his ability to convey menace and melancholy through subtle expressions make his return a major draw.
The casting decision also reflects Marvel’s strategy for the Multiverse Saga’s climax. With Avengers: Doomsday (May 2026) focusing on Doom’s rise and the multiverse fracturing, Secret Wars is positioned as the event that resets or redefines the MCU. Bringing back legacy characters like Thanos, alongside variants of past heroes and villains, creates a massive canvas for spectacle and emotional payoff. Other expected returns include potential cameos from characters like Scarlet Witch, Loki, and Doctor Strange variants, but Thanos’ involvement carries particular weight due to his role in ending the Infinity Saga.
Fan reactions have been overwhelmingly positive, tempered by curiosity about his alignment. On social media, posts range from excitement—”Thanos back in Secret Wars? MCU cooking”—to debate—”If he’s team Doom, that’s wild; if he’s against him, even better.” Some worry about over-reliance on nostalgia, but most see Brolin’s return as a natural fit for a multiversal war where past sins and future threats collide.
Production on Secret Wars is underway, with principal photography set to begin in early 2026. The Russo Brothers have described the film as “the biggest Avengers movie yet,” promising a scale that rivals Endgame while introducing new stakes. Brolin’s return adds gravitas to an already stacked ensemble that includes Anthony Mackie as Captain America, the Fantastic Four, X-Men variants, and more.
As Marvel continues to build toward the Multiverse Saga’s conclusion, Thanos’ reappearance signals that no victory is ever final in the MCU. Whether he stands with Doom, opposes him, or pursues his own agenda, Josh Brolin’s Titan is back—and the universe will never be the same.
