Nintendo's down, but not out.

[Kawaiix33]

Give it some times like other else mentioned and i think sales will began to rise rapidly.

There are so many upcoming good Wii U exclusive to look through :
1) The Legend Of Zelda Wii U
2) Bayonetta 2
3) Mario Kart Wii U
4) The Wonderful 101
5) Shin Megami Tensei X Fire Emblem
6) Xenoblade Chronicles 2
7) Super Smash Bros Wii U
8) New Super Mario Bros U

Wii U won't die quickly,just need time until these games are released. It might not be a very big successor like the Wii but it can do very well.