I've been stewing on this for the last month or so, and I would really like to see some supernatural enemies in Batman. Nolan kept things grounded pretty firmly in reality. That was good, but I'm ready to see some of the more fantastic elements come into play. Joker, Riddler, Two-Face...been there, seen that. How about Clayface, Man-Bat, or Solomon Grundy? I would like to see the Bat beat a superhuman.
I'd also like to see Scarface. I know it would be challenging to keep it on the creepy side and not the laughable side, but I can see a Nolanesque version of the character.
P.S. Mr. Toxic was only in five issues. Why did he make the cut?
I think Decaprio is a very solid and classy actor, but I can't see him playing the Riddler. All his characters have been very grounded and understated. Riddler needs some pzazz. Semi-classy pzazz.
I really would love to see Hugo Strange, particularly as I think he would fit the 'real world' vibe of the recent movies. He could begin the film as Batman's therapist while he is trying to track down Deadshot and, as the therapy sessions go on, could piece together Batman's identity. Then, as Batman finally thinks he has worked out how to stop Deadpool, could emerge as the story's other villain.
Scarface would get ruined and black mask is just a gangster. Riddler is a less good joker. Man bat, Poison Ivy, Clayface, mad hatter, ventriloquist, mr. freeze, and killer croc would just get messed up. The only villain i think left that could make a good movie is HUSH, Penguin, and Hugo strange but i don't think they would work well together. I would love to see a hush especially if Loeb consulted on the script.