source: (gamesradar.com)

Gamervision says, "The surprise hit of 2009, Batman: Arkham Asylum provided gamers with the first really great Batman gaming experience. Thanks largely to its success, Eidos revealed plans for the franchise to get a new installment every year, a fact punctuated by the announcement of Batman: Arkham Asylum 2 at the 2009 Spike VGAs. While it may have only been assumed that Eidos would be able to get a new title on shelves in 2010, it looks like we're going to have to wait a little longer to don the cowl once again. Our industry source has revealed that Batman: Arkham Asylum 2 won't be hitting shelves this year, and is likely not to arrive until early to mid-2011."