I had thought with Super Smash Bros. Brawl that came out a while ago, that it was a sign that Nintendo were planning to do more things with their franchised characters. Sadly this hasn’t been the case since 08. The only characters they’ve continued with are the ones that they’ve been doing since before SSB’s release. Pokemon, Mario, Samus, Link, Zelda, and Wario. I’ve missed a good few of those characters games, particularly Earthbound, Ice Climbers, Game & Watch, Metroid, and Fire Emblem.
I would personally like to see new entries in the Donkey Kong series, (platformer, not music game) Kirby, Star Fox, F-Zero, Fire Emblem, Earthbound, Yoshi, and maybe Ice Climber series.
Star Fox was last scene on the DS a few years ago and I’m not sure how long ago we had an F-Zero or Kirby game. Nintendo has a greatly varied franchise consisting of different genres to appeal to multiple gamers.
Metroid(FPS and Sidescrolling shooter)
The Legend of Zelda(Action-Adventure RPG)
Wario (Mini-Game thing???)