There's a launch trailer appeared for Batman: Arkham Asylum. Launch, that is, for the console version of course. The PC version is being delayed until 15th September, so it can be filled with PhysX magic. In the meantime, of course, you can play the demo, and if you're thinking of upgrading your graphics card for the occasion, NVidia has just announced they're giving away a free digital download of the game with GTX 260, GTX 275 or GTX 285 cards. In the meantime, you can see the grumpy manbat in action below.
The reviews coming in for the console versions are pretty stellar, and the demo certainly packs a hefty punch (and spinning kick). Let's just hope they remember to scrub those review quotes off the walls before the game comes out.