Can only be for the the 3DS, i don't see them announce the "super wii" before the release of the 3DS, else it will affect the 3DS hype and sells.
But we must first concentrate ourselves on the way to entertain people, for video games to live. Else, it's a world where sales representative will win, which has as effect to kill creativity. I want to say to the creators all around the world:"Courage, Dare!". Shigeru Miyamoto.