The Legend of Zelda....er I mean Sonic & The Black Knight is looking really good. If you don't mind Sonic taking on a fantasy role (even more so than the Secret Rings) then it looks like this game will be awesome. I've heard that the controls seem to work better than Secret Rings (and I liked that game a lot) so it looks like a win win.
The graphics look amazing with some nice motion blur, Dynamic real-time lighting and a silky smooth framerate. The art style is nice as well and as we know with games on the Wii, that is very important.