Batman: Arkham Asylum Villains

Hey, im not aure if i should buy this new game yet but i would like to no the villains that are featured in it. I know the Joker is, Harly Quinn is, Bane, poisen ivyis but if there anymore main ones, like the riddler, 2 face or some like that. Would be a great help i was just hoping there is more than like 3 or 4 when surly all of them would be in there

i checked IMDB for the voice talents and it shows Mr. Freeze, The Riddler, Two Face, Penguin, Blue Beetle, Ras Al Ghuland more.

Well u might not have 2 fight all of those ppl, they could just be in the game at sum point in time... u never know until the game comes out.

There is a list of them on Wiki

http://en.wikipedia.org/wiki/Batman:_Arkham_Asylum