JOhnyBravoos on 03 September 2009
If the series is going back in time then Robot Entertainment might be the ones carrying over the name : http://www.robotentertainment.com/Studio/Photos
RE is also the team who's maintaining AOE3 and Halo Wars as we speak, which means they must be in very close relation with MS.
While Bonfire Studios have an unreleased title - http://www.bonfire-studios.com/games.html But most of this team was working on the Halo Wars project which makes me believe that this'll be more of a 360 title than RE's.
