Let me see...
Artbook has the Hearthstone card art (and most likely used by Blizzard somewhere else first).
The Collector's Box is just the Legion aesthetics from the webpage, but that is to be expected. However, lacking the flare that the recent Collector's Edition boxes have (Diablo III: Reaper of Souls and Starcraft II: Legacy of the Void to name the recent ones).
Mousepad art is not even Blizzard's artwork, it is derricksong's on Deviantart.
The game disk box has the same artwork shown for Legion, but remember Warlords of Draenor's box art as changed.
The CD case is hard to make out... so I have to skip that one.
The Behind the Scenes DVD artwork looks legit, but still hard to see what it is exactly.
The Illidan Stormrage figure is a nice touch, but in no way included with the Collector's Edition (in my opinion).
So... I think this is fake. Mainly because of the mousepad artwork belongs to another artist and not Blizzard.