So I can be all pretty with the tables and everything, or I can just dump 'em all here...
So, in order of appearance these are icons of: Creeper, Riddler, Batman, Two-Face, Joker, Scarecrow, Mr. Freeze, Harley Quinn, and Bud and Lou (the hyenas).
A few of these icons seem rather similar to other icons I've seen before, but I've been unable to find them again so I made my own version. *shrugs*