Yesterday we detailed some of Batman: Arkham City's DLC release plans. This morning, we've got more.
The just announced DLC pack will release on November 1st and feature Nightwing. Like the Robin DLC, Nightwing is playable throughout all of the Challenge Maps. The Nightwing DLC bundle will also bring two exclusive Challenge Maps: Wayne Manor and Main Hall.
Also included in the DLC pack will be a "bonus Animated Series Nightwing character skin".