IGN has the following to say:
For a Batman fan, one of the best things about 2009's Arkham Asylum was the copious amount of Easter Eggs. Even rarely used characters like nut job Maxie Zeus got a nod. With a game world five times the size of the Asylum, Batman: Arkham City looks like it could be packed with considerably more hidden gems. One of the more interesting Easter Eggs we've seen hints at the emergence of Robin.
In the comic books, Bruce Wayne takes a night off to go to the circus, only to witness the shocking "accident" that ends the Flying Graysons. The lone survivor is the Graysons' acrobatic son. Wayne takes him in as his ward, eventually reveals his secret cave, and soon enough the two become the famed Dynamic Duo.
During a demo for Batman: Arkham City, we caught sight of a poster. It advertised the Flying Graysons, with the words "cancelled" stamped across it. The tragedy has already happened. But how long ago? It seems likely that young Dick Grayson is now under the care of Bruce Wayne, but it's uncertain if he's already assumed the role of Robin.
You may have caught this poster quickly passing by in the most recent Batman: Arkham City Trailer. Now we have a clear view of the poster and a number of evasive answers from Game Manager Dax Ginn, who agreed that a "tragedy" did happen to the poor Graysons and their show has "most definitely been cancelled."
This could mean Dick Grayson or Robin might show in Batman: Arkham City or it could be a tease for a third Batman game, one that features the Dynamic Duo. We probably won't have that answer for some time. After all, Batman: Arkham City isn't even out yet. Expect it in October, when we'll at least know if Dick Grayson or his alter ego will make an appearance in 2011.
BLUEmex - Now for my personal opinion I would love to see more of the Batman family in the game as cameo or even actual game play.But if you played the first game Batman Arkham Asylum, I clearly remember Batgirl is already Oracle so I doubt Dick Grayson is still Robin more like Knight Wing. So maybe Tim Drake is Robin in this game , (if he is even in the game). My favorite thing about the first game was the hints at other characters in the Batman universe , maybe is this the case for the second game? what are your thoughts? fans of the game no doubt are anxious for the Release, coming in OCTOBER 2011!