What if it turns out to be one of those awesome third party games that makes more sense as a final product on the Wii? You know, the ones that don't exist yet.
Ancel was a guy that flipped the fucking analog controls on the final boss and STILL required some Jedi-like concentration to kill it. I imagine he could think of plenty of ways to fuck around with us with the Wii's controller. I don't see Ancel as the sort of guy who makes graphics the highest priority when crafting the worlds in his games. For Rayman 2 and BGE (which I played on the N64 and PS2 respectively), it was about the music and style.