...Grayson. Nightwing's real name is Dick Grayson! And soon, you'll get to play as him in Batman: Arkham City's challenge maps on November 1st, so long as you plunk down $6.99 on the PlayStation Network or 560 MS Points on Xbox LIVE.
The DLC bundle pack lets you kick ass in existing challenge maps, but also comes with two Nightwing Bundle Pack-exclusive challenge maps, Wayne Manor and Main Hall, and an "Animated Series" Nightwing character skin.
The trailer below shows of some of Nightwing's moves and gadgets, and more importantly, shows if it's worth your money.
The Robin DLC trailer should be due soon as well, since that's coming out just three weeks later on November 22nd.