I will say this upfront I have no knowledge of the lore this movie was based on. That being said, get ready to mock my ignorance. The movie is based mainly around the kingdom of men and the Horde. Now I know the Horde is comprised of more than orcs, but this movie makes it seem like it is only orcs. Long story short, the orcs are invading and the humans are the ones that need to stop them. The elf's and Kung Fu Panda people aren't there to lend assistance. A half orc is a central character that ends the movie on the king's request. However doing so puts her in a questionable scenario from both side. The reason is that she was helping humans. Either way the orcs survive a big battle and allow this movie to set up a sequel.
Oddly enough the movie mildly touches on many interesting items. It seems like a jack of all trades, master of none kind of movie. It was just a dumb, fun ride. I enjoyed the story with the humans head mage turning evil and supporting the enemy's orc warlock. There were no fun damge over time spells, but there was a golem that spoke incantations. The coolest item they shoehorned in was making the head mage basically transform into a lich King. That cool feature didn't last long and thank jebus. For looking cool they couldn't write in script to make him seem as powerful as he should be. Also the whole write off of the head mage, or guardian as they say, was bizzare. They just shrug their shoulders and say guardian is but a name. So he dies in 10 minutes because why not. I look at this movie and compare it to Conan the Barbarian. Both enjoyable to watch but not take seriously. If you care for the lore or played the game you might want to avoid it. If you didn't just enjoy a fantasy action movie.