A Super Mario game is already out. Yes, it doesn't look like the other Mario games, but Sunshine is still the newest in the "Super Mario" line of platformers.
As for Donkey Kong, EAD is working on the next Donkey Kong game, so don't worry. All I know is that it's a platformer, but I don't know if it will be like the original DK or like Donkey Kong Country. My educated guess says it will be a DKC game (maybe 3D movement like DK64, maybe 2D movement like SNES games, who knows?). Miyamoto did say it will be "3D meets 2D", so I'm hoping it will actually be Donkey Kong Country 4...
And since the original DKC games were my favorite platforms and had about 100 levels each...This could be Kongasm! Imagine...200 or more 3D rendered levels of smoothly animated DKC gameplay, with new moves (I hope you can punch this time like in DK64) and animals and stuff! *Gamefreak goes giddy with anticipation*
I'm also hearing two rumors about DK Racing. 1. Rare is converting it to a racing game based on their Saberman or whatever series, and 2. EAD has taken over development.