With MGS4 I was doubtful about it only being possible on the PS3. But FFXIII is going to be way too large. The worlds are huge, and they have been taking forever to get it done. The cutsences are rendered in game as well. If Lost Oddessy was 4 disc, this game be like 8 discs on the 360.
I really doubt it would anywhere but the PC. Even the profit from Lost Oddessy wasn't even to compel a port. Final Fantasy would certain make more sales, but by that time the PS3 will be at $299 so anyone wanting the game would pay up to play. Worldwide I'd say 30% of 360 owners will own a PS3 by the end of this generation.
There just wouldn't be any point in porting to the 360. It would be dumbed down, difficult to fit on discs, and the game would be ruined by swapping over 4 discs during the game.
