Nintendo's strategy seems to release more key titles that are for a broader audience that could push millions of copies and push more a lot more Wii consoles.

A new Zelda, Kid Icarus, Metroid or even Pikmin titles won't push so many titles and consoles as compared to Mario Kart Wii, Wii Sports Resort, Wii Fit and the upcoming New Super Mario Bros. Wii. I can't think of any titles other titles Nintendo can release that could push so many copies except for maybe a Mario Party 9 and a 3d Pokemon game. Yes 3D Pokemon game with full blown online features. That is a guranteed 10 million + game and would push millions of consoles.

C'mon Nintendo, just do it.

3D Pokemon, and not the spinoffs, a full 3D Pokemon RPG "Pokemon Titanium" or something like that...

10M+ guaranteed...

Brawl will get there eventually.

Pokemon MMO would be insanely popular

Nintendogs for Wii?? (but that seems a little pointless, if you're home playing and you love dogs you probably have a real one and don't need a virtual one)
Brain Age for Wii?
Zelda if it's made more accessible to girls (sorry guys)

And whatever the hell Iwata is doing with that Vitality Sensor. It'll be big.

Wii Vitality is the only game I can see selling over 10m next year.

I'd say if they really want to keep selling games they've got to keep making new IP that goes into blue ocean areas like this. But in terms of revisiting franchises:

-a new Mario Kart Wii/DS
-a new, online version of Wii Sports or Wii Play
-Pokemon 3d
-A Nintendogs focused on multiplayer for the Wii.
-New Donkey Kong (based on the classic, in the style of NSMB) for Wii or DS.

Wii Vitality.

The next of the "Wii" series games.

It will be something new, probably under the Wii label. None of Nintendo's established franchises except Smash Bros. and maybe Mario have that sort of selling power on consoles.

I wish I could say Zelda, but it won't even get within that neighborhood.

It has nothing to do with IP.

A FULL-ON Pokemon RPG.

Not really my kinda thing, but with proper advertising it'll be huge. I second that.