I like Metallica, but i am not a huge fan. But i am confused where has the art come from? I don't recall any albums that had this art or figure. Unless it has been in the last few years?
Also (and i really don't want to ruin it for anyone) but when i look at the 'headbanging' figure i can only think of one thing...... 
Great to see metal ramps and and interactive toys though. 
They artwork is by a guy called Dirty Donny he did the artwork for the original Metallica pinball
He hasn't done album covers or anything like that, Metallica just liked his art and asked him to do 15 pieces for them, and now obviously he is also doing the new artwork.
Here is a little info on him and halfway down his dealings with Metallica
http://www.gravyzine.com/Dirty%20Donny.html
