Unconfirmed: Diablo III Box Art Revealed

I'm having a tough time believing that Blizzard Entertainment would release the official box art for Diablo III without plenty of fanfare, but Kaleb writes in to point out the new box artwork that's burning up the product page on Polish retailer Gram.pl. While I suppose there's a small chance that it could be official, the imagery just doesn't look high enough quality for me to believe that it's anything other than fan created. Why would they use a horned fire elemental that looks nothing like Diablo himself, anyway?

What do you think?