It's real. Nintendo of America was not pulling an elaborate prank.
http://www.nintendoworldreport.com/blog/29586
Xenoblade Chronicles came in today, and while I won't be reviewing it, I figured I'd show off its fancy reversible cover and other niceties.
Remember, if you want this game, you have to get it at GameStop or Nintendo's online store.
I ordered my copy directly from NOA, I never ever have fun when I go into a Gamestop.