Helios on 17 June 2009
I think the Wii game will not fare very well critically, if for no other reason than it's (relatively) poor presentation. Personally, I know why Nintendo did it, but I still think the NSMB style is ugly, and by the sound of it, the music will be just as underwhelming.
Gameplay will probably be a blast for those interested in multiplayer, and will be at least worthwhile for single player enthusiasts. I predict a lot of praise on forums/blogs.
Sales-wise, the DS game will win hands down, but the Wii game will still be immensely popular (8+ million sales).
