One hilariously awesome thing you could do with the Inca is have Pachacuti, or some other Sapa Inca's Mummy
be the leader. When they died, Inca did not lose their titles or possessions, and continued to hold political power. It was the job of their panaca
, their female relatives, to take care of, transport, interpret the will of the inca, and convey his wishes, sort of like mediums.
So you could maybe have "Pachcacuti" technically be the leader in the civ select screen, and when you get into the game it's Pachacuti's daughter
(name escapes me) talking and acting as the leaderhead, with Pachacuti's mummified body on a litter in the background? That would also be heckin' educational for @Hellenism Salesman