Yeah, there has been a DS Kingdom Hearts game called 358/2 days announced. (Which means that it won't be on the cover) But I still think the Wii has a pretty solid chance of getting a Kingdom Hearts game. (Not saying Kingdom Hearts 3, but maybe a spin-off or remake)
Square does seem to be interested in Wii and I could see them at least throwing the Wii at least one Kingdom Hearts.
But my guess is still on something unexpected.