Microsoft has not bought any franchises, except for Splinter Cell and maybe Star Ocean (which will probably go multiplat at some point). Microsoft did not "buy" FF, Tekken, Soul Calibur, DMC or GTA (especially that last one, it was never exclusive), because they are all STILL ON PS3. The only series one can say they've really bought, as I've said, is Splinter Cell, which was always a gimped version on Sony platforms and sold more on Microsoft platforms, particularly Double Agent.
Of course, the series in general has really dropped like a rock in terms of sales.
Exclusive DLC Microsoft has bought a fair bit of, which does annoy me. But hey, if they can afford to do it, why shouldn't they? It's not Microsoft's fault for doing it, it's Sony's for not retaliating.







