Key Takeaways
- Siege of Castle Doom, the second DLC for Marvel Cosmic Invasion, launches November 10, 2026.
- The DLC adds Doctor Doom and Invisible Woman (Sue Storm) as fully voiced playable characters with unique move sets.
- A brand-new game mode set inside Castle Doomstadt is included, with players racing toward a showdown with Doom himself.
- The DLC is priced at $7.99 and requires the base game.
- The expansion brings the total playable roster to 17 characters.
- With the Thing already in the game, Invisible Woman’s addition leaves only Mr. Fantastic and Human Torch missing from the full Fantastic Four lineup.
- The DLC releases roughly five weeks before Avengers: Doomsday hits theaters on December 18, 2026, with Robert Downey Jr. playing Doctor Doom.
- Fans are still pushing for Deadpool, Thor, Gambit, and Blade to eventually join the roster.
Alright, if you’ve been sleeping on Marvel Cosmic Invasion, now might actually be the time to wake up. Tribute Games and Dotemu just confirmed the full details on the game’s second DLC, The Siege of Castle Doom, and it is timed perfectly — dropping on November 10, just about five weeks before Robert Downey Jr. shows up on the big screen as Doctor Doom in Avengers: Doomsday. Whether that timing is coincidence or very deliberate Marvel synergy, it doesn’t really matter. What matters is that Victor von Doom is finally playable, and Invisible Woman is coming with him.
What’s Actually in the Siege of Castle Doom DLC
The headlining additions are the two new playable characters: Doctor Doom and Sue Storm, the Invisible Woman. Both are described as fully voiced with their own distinct move sets built to feel different from the other fighters in the roster. Invisible Woman’s kit reportedly leans into her light-bending and force field abilities — which honestly sounds like it could be one of the more mechanically interesting characters in the game. Doctor Doom, given that he’s the face of the whole DLC, presumably brings the kind of heavy, imposing playstyle you’d expect from the ruler of Latveria.
Beyond the new characters, the DLC introduces a brand-new game mode centered on Castle Doomstadt. Players will push through the iconic Latverian fortress — a mix of new and returning enemy types along the way, plus new modifiers to shake up how runs feel — building toward a direct encounter with Doom himself. It’s the kind of mode that fits right into what Marvel Cosmic Invasion already does well: forward momentum, escalating chaos, and a big payoff at the end.
The whole package comes in at $7.99, which puts it in a reasonable range for what’s being offered. The base game needs to be owned to access the DLC, which bumps the total playable roster up to 17 characters once it’s installed.
The Fantastic Four Are Almost Complete — But Not Quite
One of the more quietly satisfying things about this DLC is what it means for the Fantastic Four’s representation in Marvel Cosmic Invasion. When The Thing was added as part of the first DLC earlier in 2026 alongside Cyclops, he was the very first Fantastic Four member to make it into the game. Now Invisible Woman joins him, which means the team is at half strength inside the roster.
That leaves just two members of Marvel’s first family still on the outside: Reed Richards (Mr. Fantastic) and Johnny Storm (Human Torch). The fans have been vocal about wanting both of them, and honestly, it would be a weird decision to stop at two-out-of-four. Completing the full Fantastic Four lineup feels like the obvious next move if the game gets additional DLC after Siege of Castle Doom.
Whether that happens depends a lot on how this DLC performs commercially. Tribute Games hasn’t announced anything beyond The Siege of Castle Doom at this point. If it sells well, there’s a real argument for continuing the content cycle. If not, the game might wrap up with an incomplete Four and a bunch of fan wish lists that never got answered.
Timing This With Avengers: Doomsday Is No Accident
Avengers: Doomsday hits theaters on December 18, 2026 — and it’s shaping up to be one of the biggest MCU events in years. Robert Downey Jr., who the entire world watched die as Tony Stark in Endgame, is coming back to the franchise not as Iron Man, but as Doctor Doom. The Russo brothers are back in the director’s chair. The cast includes heroes from the Avengers, the Fantastic Four, and the original Fox-era X-Men. Ticket pre-sales are already breaking records more than a month out, which tells you everything you need to know about audience appetite for this one.
Dropping a Doctor Doom DLC five weeks before that film arrives is extremely deliberate. It gives Marvel Cosmic Invasion a window to ride the Doom hype while giving players something to do while they wait for the theater experience. Doom had a brief cameo in The Fantastic Four: First Steps, which served more as a tease than a real introduction to the character’s MCU incarnation. Doomsday is going to be his proper moment — the kind of major villain showcase that Thanos got in Infinity War. That’s going to bring a lot of attention back to Doctor Doom as a character across gaming, comics, and merchandise simultaneously.
For Marvel Cosmic Invasion specifically, this DLC is well-placed to capitalize on that moment. People who get excited about Doom from the trailers and end up down a rabbit hole about the character might discover the game through this DLC. That’s not a bad way to grow a player base.
What Fans Are Still Asking For
The announcement did exactly what these character reveals always do — it fired up the community about who’s still not in the game. Social media was full of requests almost immediately after the DLC details dropped, and a few names kept coming up over and over.
Mr. Fantastic and Human Torch were at the top of most lists, which makes complete sense. Having the Thing and Invisible Woman playable but not the other two just feels unfinished, and fans know it. Beyond the Fantastic Four, Deadpool has become a recurring demand. Wade Wilson finally made it into Marvel Rivals earlier in 2026, and the idea of him not eventually showing up in a game like this feels increasingly unlikely the longer it goes on. There’s also ongoing pushes for characters like Thor, Gambit, and Blade — all major Marvel names that have plenty of built-in fan bases who would love to see them in a beat-’em-up format.
Whether any of that happens depends entirely on whether Tribute Games and Dotemu see a future for the game beyond this DLC. Marvel Cosmic Invasion launched to genuinely positive reviews and award nominations, so the foundation is there. The question is whether the audience sticks around long enough to justify keeping the content pipeline open.
Should You Pick Up the DLC?
If you already own Marvel Cosmic Invasion, this is a pretty easy yes. Doctor Doom and Invisible Woman are both legitimately interesting character picks, the new Castle Doomstadt mode sounds like a solid addition to the game’s existing structure, and $7.99 is a fair ask for what’s included. The timing with Avengers: Doomsday also means the hype around the character is going to be genuinely elevated for the next several weeks, which makes November 10 a good time to be playing a game where you can actually be Doctor Doom.
If you’ve been on the fence about the base game, The Siege of Castle Doom is probably a good nudge to actually jump in. Between this DLC, the incoming movie, and the Fantastic Four being front and center in the MCU right now, it’s a good moment to be a fan of that corner of the Marvel universe — and Marvel Cosmic Invasion is one of the best ways to actually play through it.
More From the Gaming World
While the Marvel gaming scene is heating up, there’s plenty more happening across the industry. Arkane Lyon is facing a December deadline to find a buyer with 217 jobs tied to Marvel’s Blade, which adds a layer of irony given how much momentum the Marvel gaming space has right now. On a completely different note, a 1998 Pokémon Red prototype cartridge just sold for over $100,000 at auction, proving that gaming history never stops being worth serious money. And if you need something to play right now for free, Bounce Quest went free on Steam — a brutally hard 2D platformer that will test your patience in the best possible way.
