I'm more nervous than anything, really. With how poorly the Wii U has been selling, I'm worried that Nintendo are going to start rushing out games and releasing half-baked product. Mario Kart VII is as bare-bones as it gets due to being rushed, and I'm really worried that the Wii U game will suffer the same fate. And that game still sold over 8 million copies and counting, so clearly Nintendo have no reason to try any harder.
I know, I know, I should have more faith, but this is where I am right now.
Oh, I also want to see how "X" is shaping up, though I don't think it's been confirmed that it'll be shown. And what Retro's doing, which I don't think is confirmed either, but highly likely.