dude, ITS FREAKING GENIUS!!! Im playing xenoblade Chronicles now on the Wii U, wich i bought from the Wii u eshop, its an amazing game i couldnt get otherwise.
EDIT: NVM thats not what backwards compability means xD
remove the eShop thing and buy the Wii disc version then it is backwards compatibility. And yes, Xenoblade Chronicles is an amazing game. :)