Rumour has been flying (pardon the pun) for over a year about a possible game based on the Dark Knight movie, but the passing of Heath Ledger silenced it. Lately however it appears that a title may still be in the works. It is supposed to be worked on by Electronic Arts and Pandemic, most notably responsible for the Mercenaries series and it is said to have a GTA-style design to it. EA originally thought the movie would not be successful enough for a game tie-in and they were obviously proven wrong. More info.

It was even "confirmed" by none other than Gary Oldman, known as Commission Gordon from the movie. It was reported before July and was even posted on Youtube, but has since been removed by G4. More info.

It's hard to say if this game will ever be released at this point in time as well as who will be doing the voices of the game or what characters will be playable. Only time will tell.