Check out a gallery of leaked photos – including images of a Jack Nicholson-meets-Heath Ledger version of the Joker – from the forthcoming video game Batman: Arkham Asylum.

How much does gas cost when you build your own Batmobile?

Check out 15 minutes of gameplay footage from the forthcoming video game Lego Batman. (via Kotaku)

Scientific American magazine claims that Batman could exist in real life: "But not for long."

Two-faced district attorney Harvey Dent makes an appearance in a new trailer for The Dark Knight starring Christian Bale and Heath Ledger. (via digg)

The creators of the latest Batman movie, The Dark Knight, say they will market the movie as planned despite the death of actor Heath Ledger. Director Christopher Nolan: "He was immensely proud of the work he did on the film. I feel a great burden to present that in an undistorted form."

Go through the list of viral sites tied to the upcoming Dark Knight movie and a featurette filmed in IMAX. (via BuzzFeed)

The viral advertising campaign for the Batman sequel continues with a new website seeking "recruits" for the Joker's army. (via digg)

Warner Bros. has started an early viral campaign for The Dark Knight with two websites. One shows actor Aaron Eckhardt as Harvey Dent, the other reveals the first official image of Heath Ledger as The Joker. (via Ain't It Cool News)