Marvel Cosmic Invasion’s next expansion, The Siege of Castle Doom, launches November 10, 2026, and adds two new playable characters: Doctor Doom and the Invisible Woman. The DLC also brings a new game mode built around Victor Von Doom’s own headquarters, continuing the beat-’em-up’s run through different eras of classic Marvel storytelling.
Last updated October 20, 2026.
The Siege of Castle Doom Release Date and What’s Included
Marvel Cosmic Invasion is a retro-styled beat-’em-up from Dotemu and Tribute Games that leans hard into classic Marvel eras, and The Siege of Castle Doom is its next paid expansion. It launches November 10, 2026, on every platform the base game already supports — PS5, PS4, Xbox Series X|S, Xbox One, Nintendo Switch, Switch 2 and PC via Steam — and brings two new playable characters plus a dedicated new mode set at Doctor Doom’s own castle.
Doctor Doom Joins the Roster
Doctor Doom enters Cosmic Invasion as a playable fighter for the first time, built around his tech armor and occult skillset rather than pure brawling. The new Castle Doom mode is themed entirely around him — Dotemu describes it as continuing the game’s “celebration of the golden eras of classic Marvel storytelling” by sending players into Doom’s own headquarters, though full mode details have not been revealed yet.
The Invisible Woman’s New Powers in Cosmic Invasion
Susan Storm joins as the DLC’s second new fighter, built around her force-field and light-bending powers rather than the Fantastic Four’s usual team-based gimmicks — PlayStation Universe describes her kit as never-before-seen in the game. She joins a roster that already includes pairs like Cosmic Ghost Rider and Black Panther, Beta Ray Bill and Silver Surfer, and She-Hulk and Rocket Raccoon — Marvel’s deep bench is clearly the whole appeal of this roster.
What’s Next for Marvel Cosmic Invasion
Cosmic Invasion launched in 2025 with a 15-character roster, and the paid Cyclops and The Thing pack brought that to 17. The Siege of Castle Doom is the second major DLC drop since launch, and adding Doctor Doom and the Invisible Woman brings the total playable roster to 19 fighters as of this announcement — Dotemu has treated the game as an ongoing live release rather than a one-and-done beat-’em-up. Gematsu first reported the DLC’s release date and character reveal on October 19, 2026.
| Detail | Confirmed info |
|---|---|
| DLC name | The Siege of Castle Doom |
| Release date | November 10, 2026 |
| New characters | Doctor Doom, Invisible Woman |
| New mode | Castle Doom-themed mode (details TBA) |
| Platforms | PS5, PS4, Xbox Series X|S, Xbox One, Switch, Switch 2, PC (Steam) |
Frequently Asked Questions
When does the Siege of Castle Doom DLC release?
Marvel Cosmic Invasion’s Siege of Castle Doom expansion launches November 10, 2026, on all platforms the base game currently supports.
Which characters does the DLC add?
Two new playable fighters: Doctor Doom, built around his tech armor and occult abilities, and the Invisible Woman, built around her force-field and light-bending powers.
Is there a new game mode in this DLC?
Yes. A new mode centered on Doctor Doom’s own headquarters launches alongside the two characters, though full details haven’t been revealed yet.
What platforms is Marvel Cosmic Invasion on?
PS5, PS4, Xbox Series X|S, Xbox One, Nintendo Switch, Nintendo Switch 2, and PC via Steam.
