I don't see it doing anymore than 12 million by the end of 2014. And that's only if Smash Bros becomes a huge system seller. The system will drop dead in January, and won't pick back up until Mario Kart 8 comes out. Luckily it's library is much better now so it shouldn't have the abysmal weekly sales that it did early 2013.
Sigs are dumb. And so are you!