It will do between 2.5 and 5 millions.
I will not buy it (and I did buy Link's awakening remake and A Link Between World on 3DS).
The art style is bad, and playing as Zelda turn it instantly into a secondary spin off and I think that will throw some people off. It will do better than Princess Peach game but won't appeal to a large audience and will be labeled girly due to Zelda and the artstyle.