Probably not. It's bad enough that I only bought the 3DS for New Leaf.
Pretty much this.
I was willing spend the money of the 3DS because New Leaf was not the only game I would use it.
I barely use the Wii I have now, and I only use it to play SSBB on it, but that is on the 3DS as well for the upcoming game.
The Wii U would be to expensive to just buy for one game and not use it.