Realistically, what is the biggest franchise that Microsoft can buy out that would give them first place in console sales?

[Captain_Tom]

MoHasanie said:
Maybe GTA + COD would put them in first place.

READ the OP people.  "What it is the biggest franchise that MS can buy..."

 

MS will NEVER be able to buy GTA or COD (Unless COD goes majorly downhill in a couble years).  Tomb Raider is an example of a franchise that was just bairly unsuccessful enough to allow MS console exclusivity for a few months.  What else is out there like that?

Maybe Bioshock?  They could buy the rights to that I suppose and continue the franchise.