Dotemu and Tribute Games have revealed Marvel Cosmic Invasion: The Siege of Castle Doom, a premium DLC coming to the arcade-style beat ‘em up this fall.
The DLC puts Doctor Doom at the center of a new game mode and will also add two playable characters.
Doctor Doom Enters the Fight
The first teaser image for The Siege of Castle Doom gives fans an early look at Doctor Doom’s role in the next piece of Marvel Cosmic Invasion content.
Dotemu and Tribute Games have not shared full mode details yet, but the DLC will focus on Doom and his fortress, bringing a new threat to the co-op brawler.
Credit: Dotemu
New Mode and Playable Characters
The Siege of Castle Doom will include a new game mode alongside two new playable characters.
Marvel Cosmic Invasion already uses tag-team co-op combat inspired by classic Marvel stories and entertainment, so the new characters should add more team options when the DLC arrives.
Over 1.5 Million Players
Dotemu says Marvel Cosmic Invasion has now reached more than 1.5 million players.
The game has also earned a D.I.C.E. Awards nomination, adding to the momentum behind its first major premium DLC.
Launching Fall 2026
Marvel Cosmic Invasion: The Siege of Castle Doom launches in fall 2026 for PC via Steam, Nintendo Switch, Nintendo Switch 2, PlayStation 4, PlayStation 5, and Xbox Series X|S.
More details on Doctor Doom, the new mode, and the two playable characters will be shared later.
