My one fear, as seen already on this thread, is that so many people have different ideas of what they want in a Nintendo themed land, meaning some people will be disappointed with what they ultimately decide to do. I really can't see them doing mini lands in the space of Kidzone as it would be fairly cramped, unless they only included a few (like Mario, Zelda, Pokemon).
I still would prefer this to take over from Toon Lagoon, because there is more land to work with and the main characters there (Popeye, Dudley Doo Right) will not be too well known in twenty years.