Wii development of the game stopped, and Wii U development began.
Pikmin is coming to Wii U, said Shigeru Miyamoto at the E3 2011 developer presentation.
The game was worked on for Wii for several years, but recently, the next Pikmin game switched target platforms and is now indeed coming to Nintendo's next system. It is likely that it will be a launch title, or at least close to launch.