Coming back and answering.
I am going with MW2 unless FFXIII bundle is same price as PS3 without game. I just cant imagine that Sony would do that. Since FFXIII is 3rd party Sony will need to provide SE the same amount of cash per bundle as they would if the game was sold separatly. PS3 is already losing $ at $299. Add how much SE would demand and the loss would just be nasty.
Its libraries that sell systems not a single game.