Honestly I don't think Pikmin 2 is going to come out for the Wii. It is near the death of the console and Miyamoto-son already said hinted at Pikmin 3 for the Wii U. I just don't see it happening.
No, Pikmin 3 is for Wii U. Gamecube games ceased production when the Wii was released.
Pikmin 3 is only made for Wii U.
Yes
Yes, they have confirmed the making of Pikmin 3 on the wii u in 2012.
Pikmin 3 is not yet released for Wii U.
If you purchase Pikmin 3 at the Nintendo Store, then you can download it onto your Wii U. Downloading is unavailable for the other two games.
Pikmin 3 will be released for the Wii U, but the price of games for the system has not yet been announced. It can probably be assumed the price will be $50-60, however.
Shigeru Miyamoto, creator of the Pikmin series, announced at E3 2011 that the game would be shifted to the Wii U, Nintendo's upcoming console.
Pikmin 3 is a Real-Time Strategy game. It is the sequel to Pikmin 2, which was a Real-Time Strategy game released for the Nintendo GameCube and Nintendo Wii.
Anywhere between April and August 2013, unless it is delayed again.
You probably know all this by now, but pikmin three has been confirmed for the Wii U, and by now they have lots of info and even some game play regarding it.