I loved Little King's Story on the Wii, if only for the fact that it abandoned useless waggle in favor of a streamlined, simple control system. It seems as if a lot of other people did too, but that raw excitement isn't enough to warrant a Wii sequel, as the next title is slated exclusively for the Playstation Vita.
Up until now, we had no real idea of why this was the case, but producer Takanori Murayama shed some light on the subject in a Q&A with Game Informer yesterday. He cited three main reasons for choosing the Vita over the Wii: the Vita's touchpad, HD graphical support, and better online/network/transaction support.
Of course, all of these reasons against a Wii sequel are expected to be addressed with the upcoming Wii U (although true network support is yet to be seen), so a Wii U port is probably not out of the question. There's a few other tidbits in the Q&A that are interesting as well, like an explanation of coop, and DLC plans.
New Little King's Story Q&A [Game Informer]