User blog comment:The Crimson Eagle/Batman: Arkham Asylum alternate endings/@comment-5557876-20120816005609

I mean, they all did it. Its not a matter of which one most likely did it. But the one that makes the most sense is probably Bane. In Arkham City he's gathering up the last of the Titan for himself. Croc is just a natural-born beast. Scarecrow doesn't use Titan, so I don't know about that. But I don't really understand the question.