What villains do you want to see in future Batman movies?

Two-Face (although this is pretty much a given, seeing as how Dent will be in the Dark Knight)
Killer Croc
Black Mask (I can see Ray Liotta in this role)
Scarebeast
Harley Quinn
Mr. Freeze (how about a tragic Patrick Stewart?)
Hush
Alien, Predator and Dracula (Won't happen, but fun to think about)

And although he's not a villain, I will be first in line to see Batman tear the crap out of Superman. ^_^