I think in the next movie there should be an opening sequence where 2 great ancient warriors have a face off at an ancient city like Troy and each warrior has a shield and a spear and a sword and they go at it in a fight to the death and see if they can top the fight between me and Hector.
Then at the end of the scene, they can cut to the present with a fight between 2 of the MK characters while keeping the camera on the Greek warriors eyes and it's revealed during the movie that the MK characters are related to the Greek warriors.