The best thing to ever come out of FF10 was the mini game that was actually better than the game itself. Talking to a friend and mentioning that I've always though Square should have done a release of this game.
If this game was done in a release on a system, whether it's DS, PSP, or multi console next gen and it had not only single player but wifi/xbl/psn/infrastructure, how many people here would buy it?
There's FF7 Snowboarding which already had a cell phone release and there's Triple Triad which has had fan made releases though I'd say would also be good on a regular release, but Blitzball is to a much larger scale than any other mini game that Square has put in their titles. Why not release something like Blitzball?