"Rocksteady has really made a name for itself since its founding in 2004. Though the studio has only three games under its belt, two of those are the critically-acclaimed Batman: Arkham Asylum and Batman: Arkham City, which have been lauded for being so faithful to the source material. It’s clear that Rocksteady can’t continue working on Batman games until the end of time, though there is plenty of material to draw from, but the question is what direction should the studio take once they are finished with the Dark Knight’s story?"
The Avengers!
Spawn needs a good game. he is an awesome character who has never received his worthy title yet.
They work for WB so I doubt they'd be able to do Marvel without a lot of contracts.
tmnt
good question, how about superman..