If you’re interested in the PS3 exclusive DLC that Eidos has planned for Arkham Asylum, well we’ve got great news for you.
Eidos has confirmed that it won’t cost you anything to play as the crazy one himself, The Joker, in the upcoming Batman game. He will be available as free DLC. So those of you who pick the game up, don’t hesitate to play as the funny man!
[Source]