With the recent influx of media I find this rumor hard to believe. The credibility of the source is hard to refute, and it looks like Batman: Arkham Asylum could be delayed until Holiday 09.
According to the folks at Game Informer, the latest series in the Batman world is going to be delayed until Holiday 2009. A Warner Bros. representative has said no comment on the question as to if the release date of June 23rd is still a valid release date. Sorry, Batman fans. Looks like you won’t be committed to Arkham until this Christmas if this holds together.
Source: Game Informer