It's coming out on January 10. We don't know the price yet - it's still in discussion with Nintendo Europe. And of course, the free demo is releasing tomorrow (Dec 6) in the USA - the first world of the game playable for free. - Endgame Studios
You really should check out the free demo. As I said in my review, the presentation might be bare-bones, but the gameplay will really have you thinking in new ways.