I'd HATE for KH3 to be multi and I'm 100% positive it won't be and will be Wii exclusive.
Well you may hate it, but if S-E thinks there is more money, they could do it.
Plus it wouldn't have to cost too much. We're already seeing the Wii get much better graphics than last gen. So the game would be made first for the Wii, with only texture and screen resolution increased on the other systems.
Plus then they could make more money offering ports of the first two games (and maybe CoM Final Mix) on the Wii and 360 for newcomers to the series.
A flashy-first game is awesome when it comes out. A great-first game is awesome forever.
Plus, just for the hell of it: Kelly Brook at the 2008 BAFTAs