While this isn't the next Wii game I'm getting (this is, keep an eye out), it's certainly the next Nintendo blockbuster. 1UP/Gamevideos.com have some unspoiler videos of the game as well, if you don't want to be spoiled. I'm sure there are NDAs and embargoes that prevent certain parts of the game from being shown (until the release date), so it shouldn't be much to worry about anyway.