OH SH!T, it looks like we have our megaton.
It's looks like that big Mario game that comes out this year could be a New Super Mario Bros game for the Wii. Recent images from IGN have shown the Wii section, and right now there a big area with it's banner covered. When you enlarge the images you can clearly see the outlines of Fire Flowers with boxes under one of the banners and under another, the words Super Mario Bros are clearly outlined with the font that Nintendo used for New Super Mario Bros title.
Damn, this is going to be one hell of a show if this is indeed true.