I'm predicting before I vote: Rogue Leader will win. Putting Star Wars in this vote makes it generally no contest, especially since it is way more fondly remembered than the other four, slightly divisive games. I predict talk about this game will not get much more than "Wow, this game is still awesome. It looks better than most Wii games."
I'd love to hear talk about Baten Kaitos: Origins, Wario World, or Killer 7. It won't happen, though. Star Wars wins.