Marvel Cosmic Invasion DLC Trailer: Every Castle Doom Detail

Dotemu and Tribute Games just gave Marvel Cosmic Invasion players their clearest look yet at the DLC that's about to put Doctor Doom front and center. The cosmic beat 'em up's next expansion, The Siege of Castle Doom, got a brand-new gameplay trailer on October 26 — and it's packed with mechanics the base game has never used before.

01A New Trailer Targets Doctor Doom's Castle

The 90-second video, titled "MARVEL Cosmic Invasion | DLC 2 | New Game Mode Trailer" on Dotemu's official YouTube channel, picks up where the DLC's lore left off after its August teaser image: Victor von Doom has built a Cosmic Inductor powerful enough to challenge Annihilus, and that puts him on a collision course with the heroes you control. It's the first time Dotemu has shown the new mode in motion rather than in a single still image, and it's the strongest signal yet of how Castle Doom will actually play.

MARVEL Cosmic Invasion | DLC 2 | New Game Mode Trailer — posted October 26, 2026 on Dotemu's official YouTube channel.

Unlike the main Annihilation Wave campaign's linear brawling, the footage makes clear that Castle Doom is a structured, replayable mode built around a run timer and permanent unlocks — closer to a roguelite than anything else currently in Marvel Cosmic Invasion.

02The Siege Gauge Puts a Clock on Every Run

Central to the new mode is the Siege Gauge, a meter that fills steadily over the course of a run. Once it tops out, Doom activates the Cosmic Inductor and the castle's remaining forces get noticeably tougher, so every fight you pick and every detour you take has to be weighed against the clock. It's a pressure mechanic Marvel Cosmic Invasion hasn't used before, and it's the thing that most separates Castle Doom from a standard story mission.

The trailer doesn't show a full run start to finish, but the beats it does show line up with how Dotemu has described the mode in its press materials: short, escalating bursts of combat punctuated by choices rather than a straight march to a boss door.

03Battery Cells, Perks and Picking Your Route

As your team fights through Castle Doomstadt's corridors and ramparts, they collect Battery Cells and complete optional challenges along the way. Those feed into a pool of twelve perks covering defense, damage output and tactical options, and the trailer's gameplay cuts show heroes grabbing glowing pickups mid-combo rather than pausing to shop between waves. The castle itself branches into multiple paths, and at each fork you choose a buff that reshapes how your hero handles the next stretch of fighting.

What the Trailer Reveals, Beat by Beat

1. 1The trailer opens on Castle Doomstadt as Doctor Doom reveals he's built a Cosmic Inductor powerful enough to challenge Annihilus — and that it threatens the Earth his heroes are sworn to protect.Opening
2. 2A HUD element introduces the Siege Gauge, a run timer that fills as you fight; once it's full, Doom activates the Cosmic Inductor and his castle's forces grow noticeably stronger.Early
3. 3Gameplay cuts show heroes collecting glowing Battery Cells and completing side challenges inside Castle Doomstadt's corridors, each one unlocking one of twelve defense, damage or tactical perks.Early-mid
4. 4The footage splits into multiple paths through the castle's winding corridors and ramparts, with players choosing buffs at each fork that reshape how their hero fights for the rest of the run.Midpoint
5. 5Clips show Mister Fantastic's Stabilizer device charging as Doom's forces fall, tying the run's combat directly to the mode's win condition rather than a simple timer.Late
6. 6The trailer closes on confirmation that Doctor Doom and Invisible Woman join as new playable characters, before a title card locks in The Siege of Castle Doom's November 10 release across PC, PlayStation, Xbox and Switch.Closing

That branching structure means two players starting the same run can end up with very different builds by the time they reach Doom himself, which is new territory for a series built mostly around a fixed roster of heroes and fixed combos.

04Why Doctor Doom Needs the Cosmic Inductor

The narrative hook is straightforward on its face: Doom wants a weapon strong enough to stand against Annihilus, and he's willing to threaten Earth to build it. Dotemu's own description of the mode leaves the door open for something more complicated, hinting that Doom's ambitions could eventually be turned toward the heroes' side against a bigger cosmic threat rather than resolved in a single siege. The trailer doesn't spell that out, but it's consistent with Doom's long comic-book history of alliances of convenience.

Mechanically, beating down Doom's forces inside the castle charges the Stabilizer, a device credited to Reed Richards. That ties combat performance directly to the mode's win condition instead of relying on a separate boss gauge, and it's the clearest hint yet that Mister Fantastic has a hand in this DLC even without being a playable character.

05Reed's Lab Keeps Your Progress Between Attempts

Whatever happens at the end of a given siege, the rewards don't vanish with it. Equipment and events unlocked during a run attach permanently to Reed's Lab, and later runs can apply modifiers that make the castle harder in exchange for better rewards. That persistence matters for a mode built around repeat attempts, since a rough run against Doom's escalating forces still leaves you with something to show for it.

06How This Fits Into Marvel Cosmic Invasion's DLC Plan

The Siege of Castle Doom is Marvel Cosmic Invasion's second paid expansion, not its first. Dotemu's first DLC, which added Cyclops and The Thing to the roster, launched in May 2026 for $3.99 and stuck to the base game's existing beat 'em up structure — no new modes, just two more fighters with their own move sets. Castle Doom is a bigger swing by comparison: it's the first time the game has shipped anything resembling a standalone mode rather than more content for the same campaign, and pairing it with two new heroes in Doctor Doom and Invisible Woman suggests Dotemu is treating it as the bigger of the two releases.

That history is also the best available guide to what Castle Doom might cost. Dotemu hasn't announced pricing for DLC 2, but its predecessor's $3.99 asking price for two characters gives a reasonable baseline for an expansion that bundles a full game mode with two heroes on top.

07Release Date, Platforms and What's Still Unconfirmed

The Siege of Castle Doom launches November 10, about two weeks after today's trailer, bringing Doctor Doom and Invisible Woman in as new playable Super Heroes alongside the mode itself. It arrives on every platform the base game already supports: PC via Steam, PlayStation 4 and PlayStation 5, Xbox Series X|S, and Nintendo Switch and Switch 2. Dotemu hasn't published a price for the DLC, and neither Doom's nor Invisible Woman's specific movesets have been detailed outside today's footage, so treat both as unconfirmed until closer to launch.

For now, the trailer is the best preview available, and with the game's existing roster already built around co-op chaos, a run-based mode that rewards smart route choices over Doom's escalating siege looks like a natural fit for the formula.