After seeing NSMB's great success (nearing 5 million in Japan, selling awesome-like elsewhere), and seeing the awesomeness that is Paper Mario...
Does anyone else think that a 2D-playing platformer would be a great idea on the Wii? It could, of course, do some things new to help give it shiny-ness, but it should also be relatively easy and cheap to develop, be accessible to a wide audience of both hardcore traditional and non-gaming casuals (just as NSMB on the DS is), and be a great fit for the Wii.
Also, 2D is not dead. Give it 3D graphics if you like, or give it 2D sprites, but a 2D platformer, with charm and straightforward fun, would be welcome, wouldn't ya think? (also, maybe budget priced!)