Warner Brothers just announced the first DLC for Batman: Arkham City. The Nightwing Bundle Pack will be available on the PSN, November 1, for $6.99.
The DLC includes Nightwing, a.k.a Dick Grayson,the old Robin. Nightwing will come with his own gadgets, moves, and special maneuvers. The DLC will also include two new challenge maps, Wayne Manor and Main Hall, and Nightwing will be playable in the other game challenge maps as well. An animated series Nightwing costume will also be included.
The Robin Bundle, which was previously only available through pre-order, was also announced to be coming on November 22, and will also be $6.99.
Source: Press Release