Fuck I should've gotten it on PS3 instead. I had forgotten about that.
I hear the PS3 has other special features, along with playing as the Joker.
Still, XBOX does have a "downloadable content" feature as well, so who knows what will be in store.
I don't see why both platforms can't just be the same.
I know I'm in the minority, but I just prefer the 360 controller over the PS3's.