Say Tim Seeley on his version of Killer Croc:
"I think there's a tendency to tell stories about Croc where he's just a monster who doesn't understand things. Maybe he can't understand romance or people, and it's just dumb. At the end of all these Croc stories, he just flops down and gets arrested. I don't know why. I knew I had to tell a story about how, despite his obvious difficulties in looking like a monster and everybody thinking he's dumb, he rises above that. What's he got going for him? What are the things that make Croc completely different from all the other Batman bad guys?"
More at the link below.