Before Call of Duty: Modern Warfare 2 was released, one of the characters - Ghost - starred in a 6-part comic book series. According to the actor who voiced him in MW2, he might get his own game, too.

"I'm now voicing a guy called Ghost, who now just got a spin-off comic of his own and they're talking about another little game to go with it," Craig Fairbrass told Inside Xbox at the UK launch event for MW2.

"Little" being a relative term. MW2 sold 4.7 million copies so even a scaled-down spin-off would make a big splash. I get the feeling any such project would end up growing into a full retail product, too. Remember how Halo 3: ODST was originally going to be just a being a 2-3 hour, single-player-only expansion to Halo 3?