Skyward Sword. I know it's already out and I already have the game, but I don't own a Wii. I was planning to buy one before Skyward Sword came out, but then Nintendo announced the Wii U, so I decided to wait for the newer console.
Smash Bros for the Wii U and 3DS. I love the Smash Bros series.
Xenoblade Chronicles. Again, I know it's already out, but I need the Wii U first.
F-Zero GX. I know this game is way old, but I just got my Gamecube a few months ago, and I haven't bought this game yet.
That's it for now, but other games will probably come to mind later.