Zelda is not that big of a series in Japan ... The series typically sells between 750,000 to 1,500,000 and it usually crawls to those sales slowly over many years.
Absolutely true. Despite the nasty 2nd drop, I'd like to think that Skyward Sword still has a chance for legs in Japan. Its following there may not be as huge as, say, America, but at least it DOES have an audience. I doubt SS will die that easily. I can see it going to 450k by the end of the year.
Anyway, other things that I'd like to see on Zelda WiiU, aside from graphics and music, would probably be another new villain.