Warner Bros. just announced the first piece of DLC for Batman: Arkham City. The Nightwing Bundle Pack will be available on the Playstation Network and Xbox LIVE on November 1 for 560 Microsoft Points or $7, which should give you ample time to finish up the game proper before checking out Nightwing.
Nightwing, a.k.a Dick Grayson, who used to be Robin, comes with his own fighting moves, unique gadgets and special maneuvers. He's playable in all challenge maps in the game, as well as two additional challenge maps that are included with the DLC: Wayne Manor and Main Hall. The pack also contains a bonus Animated Series Nightwing character skin.
Warner also said the Robin Bundle Pack is scheduled for release on November 22.
Check out Nightwing in action in the video below: