A member of the PlayStation Store's team revealed a few details about the upcoming Batman: Arkham Asylum downloadable content. For starters, there's two DLC packs on way, not just one.

"The two additional packs are coming in the next two weeks, one per week (Insane Night 17th Sept and Prey In The Darkness 24th Sept)," said Mike Kebby on the PlayStation.Blog.

The September 17th date for the first batch of DLC fits with the recent announcement on the Batman: Arkham Asylum news ticker. That particular content is supposed to be free. It's yet to be determined whether the second offering, "Prey in the Darkness," will be free as well.