In my opinion, it won't. The most it can sell would probably be around 300,000 copies in 1 year. If you look at other Wii U games like Bayonetta 2 and Wonderful 101, they only sold 590,000 and 300,000 respectively. But there's also a chance this Kirby title will sell well and better than other Wii U games. Kirby Triple Deluxe (3DS) sold 1.3 million after all. It seems like many people right now are into Kirby games than before.