again, i doubt the final mix will release in 3ds. also i doubt kh fans would dump there PSP just because they have 3ds. that's like dumping nintendo 64 just because i got a ps2. if they will make a final mix, it will release in japan only most likely, so even if sales aren't high in NA i'm sure they will gain some profit in japan
The FM probably wouldn't be released for about 3 years(Considering they are developing Agito and the 3rd birthday). The 3DS would have been on the Market for 2 years by then. All I'm saying is that there is a possibility for it. The 3DS is said to have sophisticated anti-piracy software. Making it extremely difficult to hack, that alone may sell the idea to Nomura.