What will be the Wii U's peak sales year?

[garretslarrity]

I think the title said it all.  Feel free to explain why as well.

 

For reference, according to VGChartz:

2012: 2,247,216

2013: 3,232,667

 

My guess: 2015.  I say this because it will gain momentum in 2014, which won't reach its fullest until the end of the year (mainly from Smash), and that will give the system a strong status and probably more noteworthy games.  I think yearly sales of the Wii U will be a smooth bell curve.