EA's contract regarding Madden ect, require them to be multiplat. If EA made them exclusive to their console they would void the contract. Activision would probably be the likely publisher to pick up the contract.
So what else does EA have? a first party on par with Microsoft, Starcraft and The Sims are best left on the PC (Sims doesn't do too well sales wise on consoles anyway from what i remember ..)
Mirrors Edge, Dead Space ect are new IPs, could be built on.
Burnout, Mass Effect (again contract with Microsoft maybe?) Rockband ...
Left 4 Dead is only published by them, in all honest I'm surprised Microsoft don't publish L4D.







