It would be great to see a new dlc of the Aztec civilization, as the Chinese civilization I liked a lot, I think a dlc of the Aztecs would be a very good idea, since in the Aztec culture there are several gods mythologioc and creatures incredible 
That’s a good suggestion, they could also add other cultures from the New World. But I think the priority, for now, should be adding a new patch to this game that would fix the bugs it currently has and balance out the Civ. bonuses against other civilisations, so it can be fairly matched on gameplay.
I prefer the Mayans.