That's strange. After reading this I went and checked for some of the listed games and also rare Wii games.
They have Xenoblade available for pre-order for the Wii-U. It lists a 12/31/13 release date (a.k.a. no release date available). I haven't heard any talk of this happening (doesn't say "Chronicles" on the listing) and I'm thinking it's just a Best Buy mess-up, but still...
WM has it too
Seems like it won't officially be Xenoblade, but a game from the makers of Xenoblade with a lot of its aspects