I would like to address this message to the Director.
I am convainced that the movie can be much more interesting if, notwithstanding there is not a true historical one, the Director will put a lot of attention to the archaeological reconstruction of the costumes, places, etc..
As archaeologist and expert in Roman military matters, and writer in this topic, I would like offer my knowledge for this part of the movie. I can just imagine how the movie could be great if the opening scene would be a gothic image of 3 Roman cavalrymen with Draco standard and gilded mask helmets, clad in the magnificent equipment of Hyppika Gymnasia.
I am at Your disposal Peter Briggs! But I hope in anycase that the final result could be satisfactory under any aspect.