The sales will only start to rise when the big guns come out. Pikmin 3? Not a big gun. Zelda Re-Make? Hm... not really a big gun. Mario Kart U? Freaking huge gun.
When we get Mario Kart U/3D Mario U the sales will really start to pull up. Every other game will have an affect on sales, but nothing permanent. They don't have that much staying power.







