This is a high tech special effects battle movie with a twist of someone from Earth traveling to a different culture in outer space.. It relies heaving on well choreographed fight scenes. It is easy to follow which side is which is this battle of good versus evil. There often is just quick, short background into what the struggles are all about,
I am wondering why, if there are a type of firearms and missiles, does this society do most of its fighting using swords? I believe the key is suspend belief in many facets of this fantasy story. It is always a disadvantage in movies about fictional societies that movies will spring important knowledge about their world to the audience. It may be best to just go with it and follow the excitement.