The Siege Gauge awaits in this new roguelike experience!

We learned earlier this month that Dotemu and Tribute Games’ upcoming The Siege of Castle Doom DLC for Marvel’s Cosmic Invasion would be arriving on Nintendo Switch 2 and Nintendo Switch starting November 10, 2026. The announcement revealed that Dr. Doom and Susan Richards (AKA The Invisible Woman) would be the two new playable characters, but the mysterious new game made that has been getting teased was still a mystery. Well, wonder no longer, as the mode has finally been revealed and detailed. Take a gander:
Here’s how Dotemu describes the mode:
Each encounter you survive will charge the Stabilizer, a genius creation of The Fantastic Four’s Reed Richards that’s capable of foiling his oldest nemesis’ newest plan. Gather Battery Cells and complete challenges to earn defense, damage or tactical upgrades from a collection of 12 different perks, but keep your wits about you: failing challenges will debuff your fighters, and Doctor Doom has set traps anticipating your arrival … Thankfully, successful runs will help permanently unlock new equipment and events from Reed’s Lab, as well as modifiers that can deepen the challenge and potential rewards available in future attempts.
As you progress through the castle, select buffs to alter your combat abilities to become more and more powerful. It will prove essential for survival as Doom’s Siege Gauge fills; it makes the castle’s forces grow in power and will end the game instantly if it becomes full. Tee Lopes provides some new music for this expansion, and there will also be new color palettes for all of the heroes in the game as they defeat Doom.
Will you be checking this out next month? Share with us online and on social media!
Source: Dotemu Press Release