While i think it should be on the Wii simply for the userbase and demographics, the only way I think it will appear there is if Nintendo licenses its characters to appear in the game as well. The room for growth in the Disney universe is very small unless the Pixar movies are added in. I believe THQ has the licenses to those movies and I don't see Square producing that many new worlds for each game. Adding Nintendo characters not only gives them almost unlimited content but also adds the Mario name to the title and we have already seen the effects that can have.