Project X, followed by Zelda. If both are awesome, it's going to be hard not to want a Wii U.

The next Mario Kart, and Smash Bros.

Xeno 2

My most wanted Wii U game is Pikmin 3 but I want to be surprised by it. I knew next to nothing about Pikmin 2 when I first played it. My cousin let me burrow it, I was very impressed with it. I didn't play the original Pikmin until after beating Pikmin 2. It will be difficult to not pay attention to info about it especially since I'm not planning on getting a Wii U until this Holiday at the earliest.

I want to hear more info on Super Smash Bros 4 though.

Any other answer is blasphemy.

Mario Kart U but we will have to wait till E3 probably or possibly at a Nintendo direct 

Mario Galaxy hands down.

Since my most hyped game for the 3DS is Zelda 3DS (even though I know it has not been revealed), I have to say for Wii U it is 3D Mario. Really looking forward to that.