Try to think of where the 3rd installment will go. I think it will be on the Wii becasue Disney is favoring the Wii over all other consoles now, and most third parties go where the money is. But at the same time, I think it will sell less since the Wii doesn't have as many KH loyalists as the PS3. Yet, it is going to make more money on the Wii due to lower costs and higher userbase.

KH followers will go on what system the game is on, so thats not really an issue

personally, i have no idea, it could go either way i guess.

I see where this is going.

I agree with neos, the game could go either way. I would hope that Sony would fight to keep the franchise on their consoles though, otherwise that would just be a shame!

Actually Sony has little to no say in where the game goes.

 true, but that happened with several other franchises aswell

 FF
DQ
Banjo =(
 

i think wii....it's a game that needs no graphics, and maniac gamers may not buy it......

PS2.

I think it will be on Wii, though PS3 would not surprise me. These are my reasons:
1. It is cheaper to develop a Wii game
2. Square-Enix has stated they are shifting their game developing emphasis to the Wii, and Disney seems to be giving far more support to Wii as well
3. Wii has a much larger userbase, and KH will sell more on it