According to Ubisoft the leaked box art for the Wii U is the real thing
Yesterday, the Wii U box art design appeared on both Amazon.ca and Target.com. GT contacted Ubisoft to ask whether the leaked Wii U box art is real or fake and a representative replied by saying, ”Why yes, the Wii U box art you sent is legit; in fact, it’s too legit to quit.”
http://mynintendonews.com/2012/08/08/recently-leaked-wii-u-box-art-is-the-real-thing/
Nintendo and PC gamer