Two worlds are coming together. They are not exacting colliding, but doing a slow merge so forget what you learned in Physics 101. I had to rewind and re-watch the explanation scene several times and it took a while for it to sink in.
"The Warrior" we follow from childhood on the planet Dominion until mortally wounded with a sacred sword. He stumbles into the Moon-lunar world where some lady of the lake heals him... and there is a different sacred sword in the lake from a former king, but it didn't play a great role and they could have left the whole sword thing off except it helped the confused ending. Now on the moon he meets a tribe of truth and discovers his world is lies...or at least alternative facts. They need to learn how to fight to defend themselves against the Dominion who we know are bad because the dress in black. The moon people live in tent villages that are slightly less than level 1 elf tents in Elvenar. And PLOT SPOILER, Warrior has a plan to kill the Emperor by getting next to him by bringing him a princess to add to his collection...something clearly inspired by "Death Race 2000." Warrior has flashbacks learning from his father and talking to the old king in dreams. The lake ending was unexpected and I am not certain what it meant, but was clearly the best thing about the film.
The plot wasn't easy to follow especially with the merging world thing. The was no clear reason for the wars, seems the worlds had a lot of space to expand. The acting was DOA and the dialogue was weak.
Review by Michael Ledo from the Internet Movie Database.