What large DLC/Spin off would you like to see next?

After the Castlevania DLC, and Warhammer Survivors, it got me thinking about what i'd personally like to see as a next crossover DLC/SpinOff (regardless of actual feasibility)
Personally 3 options i personally thought were fitting were the following:

Hyrule Survivors (The Legend of Zelda, probably a nintendo exclusive)
Fate Series DLC (the TYPE-MOON franchise)
Fromsoft Survivors (Demon/Dark Souls, Bloodborne, Sekiro, Elden Ring, but also Armored Core)

I'd love to hear which crossovers other people would like to see!
(Bonus round: Undertale/Deltarune Survivors)