Rare would be the only studio I can think of that has FPS titles under it's belt.
But it wouldn't be hard for Microsoft to find a way to either bankroll a few more exclusives like it did with Gears of War, or just friggin' buy Epic out.
Microsoft still has the weakest of the big 3 in terms of developer prowess - they just have Ensemble, Lionhead, Rare and Turn 10 - whilst they've released Bungie and Bizzarre from their stranglehold.
I would hope to think that maybe MS, in the near future, will either buy some studios, or create more exclusive partnerships like they have with Epic and Mistwaker to produce great exclusive content.
Or for all we know, MS could develop an exclusive partnership with EA, and own the world.
Back from the dead, I'm afraid.
