I suppose if you can't look like Batman, you're going to want to look somewhat similar to him, right? Well, the first step in that direction would be a shirt that actually fits you. How are you going to fight crime with your belling hanging out? C'mon.
The Joker(z?) gang on the other hand their stuff together. Green hair, check. White face, check. Rollerblades, che-- What?
Gotham City Impostors is shooting for a 2012 release, which, frankly, lends the game some cred since it's not merely a tie-in to Arkham City.