Nice pictures from the movie! This era, like most others of human history, are woefully poorly covered in cinema. Scythians and Hobgoblins marry well indeed. 
For more inspiration, see Illustrations of Ancient Scythia, to be salvaged from old CDO to new.
Also, check out the Babylon scenes from the 1916 movie Intolerance for Cyrus’ conquest of Babylon the great.
For some other Hobgoblins based on ancient steppe cultures:
