Rumors from Kotaku
I was already interested in this game, due to some of the features that are supposed to be in it, and as well as hearing that Mark Hamill will be reprising his role as The Joker.
Hearing now that for a cool $100 you get the soundtrack, a Batarang, and the first DLC pack, I think I'm signed on. (this is including the game)

My interest in this game has suddenly doubled. I will be interested to see how well this works out. Hopefully there will be a demo.

oh, and from my understanding there will be a PC version.

They signed with Games for Windows.

this appears to be a trend for multiplatform games.

Splinter Cell + BioShock = Batman: Arkham Asylum

Batarangs? FUCK YES.

It's a movie tie-in game thus it auto-fails.

So was The Chronicles of Riddick: Escape From Butcher Bay; good movie tie-ins are incredibly rare, but they can and do happen.

how is it a tie-in game?

The Bourne Conspiracy was a kick-ass game.

I played the demo of bourne and it did seem to suck a bit less than most

It's worth buying. Too bad it's not on PC.

Not a movie, comics tie-in and game will be great.

it will at least be better than most DC games anyway.