If the game will go to the platform with the most sales, it'll go to the PS2. (Just like everything else)
If the game will be on an HD platform, the game will go to both ps360 due to the userbases not being nearly as big as the the PS2's userbase.
If the game will be on a current generation platform with the most sales then the game will show up on the DS.
Simple as that.
So the game will/should be announced for the following platforms in this order:
PS2 (most likely and is the best choice)
DS (if not the PS2 then this would be the NEXT best choice)
PS360 (if the game is gonna be on a current platform then multiplatform is the way to go.)
PS3 (only if the game is still PS exclusive)
The game will not come out for the PSP/Wii due because:
Even though the Wii's user base is the biggest between the current generation consoles, the console is so different and is going towards a different audience. It will be the 7th game in the KH franchise and new people who'll get the game will be lost and will have to buy other platforms/games just to catch up. (If the new audience hasn't played KH before)
Even though the PSP is a PS platform, the only reason why I can't see this game selling on the PSP is due to poor software sales. (Maybe the sales will get better in the future though)
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
