If you are going to use the black bar, I would continue it on the back, or remove it all together. The box looks clean and official otherwise.
Are you planning to update the box or will this be a brand new one?
Well the back looks a bit different but the front looks way too similar. I would personally try something completely different and something that has never been done with this game before.
I, personally, would start from a scratch. Maybe do a different Assassin's Creed game..?
I think you should put the AC logo behind Ezio.
hi
Make the AC Logo a bit smaller on the front.
it's touching the C.E title, the Ubisoft logo and Pegi rating.
The back looks really nice, especially what you've done with the screens.
I'd suggest centering the storyline bar and make the text align at the center.
It's looking great so far.
IMO it looks like your old ACB boxes but it's not that bad.
The back looks very familiar to your previous box. I would rework the back and add some of that texture found on the front and spine.