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MARVEL Cosmic Invasion: The Siege of Castle Doom Is Coming Out in Fall 2026

The paid expansion adds a new Doom-focused mode and two playable characters, but Tribute Games and Dotemu have not named them yet.

  • On Monday, developer Tribute Games and publisher Dotemu announced The Siege of Castle Doom, a premium DLC for the arcade-style beat 'em up MARVEL Cosmic Invasion arriving in Fall 2026.
  • According to a news release, the Doom-centric DLC will feature an all-new game mode and two new playable characters, expanding the existing roster and building on the game's fast-paced tag-team combat.
  • Currently holding an 84% Critics Recommend score on OpenCritic, the brawler features 17 playable heroes, including recent additions Cyclops and The Thing from an earlier character pack.
  • Launching on Nintendo Switch, PlayStation, Windows, and Xbox Series this fall, the expansion carries no confirmed pricing or firm release date from the developers.
  • Doctor Doom continues his prominence in Marvel media, recently leading fighters in Marvel Tokon and Fighting Souls before debuting in December's Doomsday and arriving in this game.
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It's not uncommon to see how Marvel-based video games and other entertainment products try to take advantage of Marvel's eye-catching film productions. We recently saw Marvel's Spider-Man 2 receiving new Spider-Man-inspired theme costumes: Brand New Day, and now Marvel Cosmic Invasion seems to want to follow a little in their footsteps. Tribute Games' arcade-style fighting game has revealed a new DLC that is scheduled to be released this fall. I…

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Dotemu has announced the first details of the second DLC for Marvel Cosmic Invasion. Read more

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Polygon broke the news in New York, United States on Monday, August 17, 2026.
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