Something tells me EA is doing as they did with the box art for the Pet Expansion. Revising/changing the box art. Everyone has seen the one EA sent out, but now Amazon shows a different one. The one from Amazon looks a bit toned down compared to the one released by EA. See below to compare the two. Also, we will update this post once we have more info.
EA Press Version
Special thanks to Dentface for the larger version of the cover on Amazon.