Even though MS wants FF's, and they have already had FFXI, there are quite a few possibilities:
A Crystal Chronicles-esque Final Fantasy spinoff, with the FF name. If the Gamecube can get a Final Fantasy, the better-selling (overall) X360 should get something like this.
Old(er) Final Fantasies to Xbox Live Arcade. You could do co-op even, since FF4 and 6 supported multi-play. If there was a way to get 1-6 on XBLA for download, Square would stand to make huge money, and Microsoft would have a virtual library of Final Fantasy history
An eventual port of FFXII and so on. FFXI came to 360, so it's likely that more could come, but I'd say the chances of a day-and-date FFXIII to X360 are about as likely as the Wii getting one.
Back from the dead, I'm afraid.
