It was shit. They base it off of the RTS Warcraft orcs and humans instead of World of Warcraft. In my experience, only a small fraction of people played Warcraft compared to how many played World of Warcraft. Not many give an ass damn about Warcraft the RTS, people wanted to see World of Warcraft the movie and Blizzard failed to deliver. You only see 3 classes in the entire movie warrior, mage, and warlock and all of the other races are barely noticeable. Undead and tauren are not in the movie at all. You are going to be staring at orcs and humans a lot. Beyond that I think the story line was shit even if they did hold true to the lore, and Durotan was just played horribly.
4/10 just because the special effects were okay. It's a junk movie be wise, save your money, don't go see the it, and remember wow in a better light.
Let the flames begin.