Pikmin 3 will be for the Wii U.
Pikmin was amazingly fun because you had to get all the necessary parts to the spaceship in 30 days. This deadline encourages strategy, multitasking, and planning on how to efficiently use your time before your time runs out. In Pikmin 2 the deadline was removed, but in its place were more Pikmin, complex bosses, and deadly terrain. I had more fun with Pikmin 2, but the first was a classic, and I still feel challenged everytime I play it again.