FF13 VS was PS3 exclusive from the start, I doubt they suddenly change their mind a few months before release, especially when 360 JRPG exclusives flopped so hard and with the 360 selling 2k consoles per week in Japan.
People were talking about MGS4 coming to 360 too, and it never came.
In my opinion, there's a lot higher probability you see Mass Effect trilogy on PS3 than FF13VS on 360. EA didn't release any HD console exclusive except this one after all.
SE on the other hand did both exclusives and multiplatform games until now.







