@ Morgyn
I think you have been looking at the wrong pictures.
While MKWii doesn't look as much better than MK:DD as Galaxy does over sunshine, and Brawl over Melee, I still see an improvement.
Is it OK to put pictures in this thread? I'm putting some, but just tell if I can't, and I'll remove them.
MKDD close-ups
MKWii close ups:
That doesn't look to me much difference. MKDD might even look better.
MKDD; Courses
MKWii:
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS