I'm often reminded how formulaic Microsoft is to this business. It's like, buy a studio, take a beloved franchise, and boom -- another classic. It's the George Steinbrenner model of gaming... spend whatever it takes. Problem is, there were more years than not that the Yankees didn't get a world series ring even in spite of Steinbrenner paying in penalties what other teams did for their entire ball club's salary.
If this shit were that easy, everyone would be doing it. But there is no amount of money that can replace the magic that comes from talent working in synergy. You couldn't buy the team that made the first Halo or Mario 64 or Goldeneye or Gran Turismo any more than you could get four guys, a couple of guitars and a set of drums and get a top ten record. I certainly don't want to dissuade Microsoft from bringing new content out from popular franchises, but more often than not the result is pretty mixed and honestly the money would be better spent elsewhere.