Nintendo seems to be reworking the formula of Zelda on this game, so it could go either way.
Zelda is interesting because it feels like there's two segments of the audience. There's the modern Zelda fan who started on OOT and progressed through it's sequels, then there's the classic Zelda fan that played the original 2d games and stopped after OOT.
I think Skyward Sword has a chance because it's trying to bring in both segments. What I've heard about there being more density in the overworld, more focus on gameplay over story, and even the motion control aspect makes me think they are trying to appeal to classic Zelda fans.
I think if they are successful in doing this, it could sell maybe 9, hell even 10 million.
However if they just piss off both classic and modern Zelda fans it could be really bad.
