With Eight Days and The Getaway just canned, maybe London Studio has some people working on this now, and not just EyeToy and SingStar games.
As important as this game will be to the Sony platform (it is the game that puts me over-the-top when it comes to buying the PS3 in the coming months instead of years) I find it hard to believe that Sony would kill two games and allow devs to help 2K when 2K has all of the help it needs in house. I believe 2K San Francisco has the duty of recoding this game. Sure maybe they contracted some London PS3 first party devs but who knows.