Normally I would rather smell a snifter of my own farts than report on new Xbox 360 Avatar items for sale but this one carries an air of interest to it. New items are now available from Arkham City for you to play dress up with and between dressing up like Batman or Catwoman, you can buy a T-Shirt with Nightwing's logo on it which seems to confirm his appearance in the game, very likely as a playable character.

Hopefully we'll see an official announcement soon.