Sony owns the majority of SquareEnix, right? So why would Sony allow Square to make a FFVII game on the Wii. And you can forget about KH3 going to a Nintendo platform. That ain't happening anyway. If the PS3's userbase isn't up to snuff by the time these games are release/announced then they'll come out for the PSP. KH3 could still even come out for the PS2 for a last hurrah, just like Twilight Princess was for the GC.
Generation 8 Predictions so far.....(as of 9/2013)
Console that will sell most: Nintendo Wii U
Who will sell more consoles between Microsoft/SONY: SONY