The day a Nintendo console sees competent 3rd party support is the day you'll see Nintendo stop using him so much. I mean they're holding their console afloat single-handed.
I imagine if we see some real, actual, non-shitty 3rd party support they'll do a Mario platformer (what's a Nintendo console without a Mario platformer?) and then dig around in their archives for stuff we haven't seen in a while.
3rd Party Wall of Shame
http://www.nintendoworldreport.com/forums/index.php?topic=30478.msg581036#msg581036