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Doctor Doom is stepping out of the shadows and straight into the spotlight. MARVEL Cosmic Invasion just confirmed its first big expansion, “Siege of Castle Doom,” and it’s arriving this fall with the iconic villain as the main event.
What happened
The DLC drops Doom into a brand-new game mode built around his castle, giving players a reason to storm the fortress of one of Marvel’s most theatrical bad guys. Alongside him, two new playable characters join the roster, though the studio hasn’t detailed exactly who yet. The expansion is confirmed for PS5, Xbox Series, and Switch 2, with more platforms likely to follow given how the base game has been rolling out across consoles.
Why it matters
MARVEL Cosmic Invasion has been carving out a nice niche as a modern beat-’em-up that leans hard into old-school arcade energy while dressing it up with Marvel’s deep bench of characters. Doctor Doom is exactly the kind of villain that pushes a brawler forward — he’s got the gravitas, the gadgets, and the ego to justify an entire mode built around fighting through his castle. It’s a smart pick too: Doom rarely headlines these kinds of games directly, so seeing him get a dedicated set piece instead of a quick boss cameo is a nice change of pace for fans of the character.
What to expect
Don’t expect a story-heavy DLC — beat-’em-ups like this tend to prioritize new stages, new combos, and new ways to smash through waves of enemies, and “Siege of Castle Doom” looks built in that same spirit. The two extra playable characters should be the real draw for anyone who’s already cleared the base roster, giving veteran players fresh movesets to experiment with. Given the “this fall” window, we’re probably looking at a release sometime between September and November, though an exact date hasn’t been locked in.
A dedicated Doctor Doom mode is a solid way to keep momentum going for a game that’s already built a loyal following among co-op brawler fans. If the castle siege delivers the chaotic, boss-rush energy it sounds like it’s aiming for, this could end up being the DLC that convinces stragglers to finally pick the game up.
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