CAL4M1TY on 28 June 2008
If it were any other developer I would say average at best, but Nintendo do have a knack at bringing their 2d characters into the 3rd dimension or at least being able to hand pick a good developer to do it, so I'm going to say it'll be a good game.
That's assuming it were a 3d game, if it were a 2d with 3d character models (NSMB) then it'll be guaranteed awesome.
