Still game has no correlation to KH which is a JRPG. This won't appeal to that crowd.
Frankly, at this point I have no idea who they are making this game for. Mickey alone will seem to kiddie for teens/adults and the game looks to dark for kids. Pre-teen boys might gobble it up but thats a small market all in all, especially on Wii.
I won't make any predictions until I know more about the game but from what I do know, I'd said this game will struggle to find an audience.