Thats clearly not real its a fanmade case (With photoshop or other software). I really like that though, gives us a better picture of what its going to be like when we actually have a copy of the game in our hands.
If you ask me, look at the 360 logo strip that runs across the top of the game case in the picture. Looks fake to me. And the 3 pictures just so happen to be 3 of the screenshots released so far. Could be real, but doubtful.
I want something simple, something in the same style as we've seen before, think about it, all the covers basically look the same with the exception of background colour. I want to see that trend continue. Even if I won't get the retail edition unless the collectors edition is ridiculously awesome.