Lucky Playstation 3 owners will get to walk around the Batcave using PlayStation home.
According to the PlayStation blog:

We know that you Home-dwellers just love your rewards, so we’ve worked with the fine folk over at Eidos to ensure that their next release integrates tightly with our platform. Those of you who scoop up the highly-anticipated Batman: Arkham Asylum for your PLAYSTATION 3s next week will be pleased to see that the game unlocks a special Batcave Outpost personal space. It’s safe to say that hardcore Batman fans are going to seriously spazz out when they unlock Bruce Wayne’s secondary lair under Arkham, so if you count yourself a disciple of the Dark Knight, you’d better rush to get your hands on this title when it is released on August 25th.

The same thing was done for the Ghostbusters Firehouse, and it looked great!
You can see the video here.

Thanks for Rolando for sending me this!!

(Source: PlayStation Blog)