User blog comment:The Crimson Eagle/Batman: Arkham Asylum alternate endings/@comment-4830623-20120818151025

I'd have to say Scarecrow. His absence in Arkham City and the creepy messages of "You will pay for what you did to me", "I will return Batman", and "Fear will tear Gotham to shreds", plus his mask, fear gas tanks, and KO'd minions would most likely mean a return of him as a main villain. Also he's my favorite character.