I'd vote for this - day#1 purchase for me :)
How about online multiplayer, with up to 4 players going through a mansion at once?
Another game I want to see:
"Mario Brothers Circus"
Do all the standard circus acrobatics (and other) things using the Wiimote, to please the audience. Bowser is the ring master with a whip :)
Gesta Non Verba
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Wii code: 2263 4706 2910 1099