I’ve noticed that the farthest we’ve ever gone into history is in the Wrath of Sparta DLC for Total War: Rome II.
If you look into the history of the Bronze Age, you’ll find that it could potentially work well as a historical title. There are multiple kingdoms/empires that all have unique cultures. The Late Bronze Age Collapse could be the event in which this game takes place, as going further back would prove less historical accuracy and not much diversity in terms of units. A good example of how it could work is the Bronze Age: Total War mod for Rome: Total War. Multiple kingdoms fighting for supremacy when all of a sudden, numerous migrating groups flood into the Near East and demolish nearly everyone.
Not to mention possible DLC’s which could include the rise of the Iron Age and include campaigns featuring the Assyrians, Persians, Medians, Babylonians, Egyptians, Greek city states etc. or maybe even a potential Trojan War DLC.
I feel like this is definitely a piece of history that CA should consider. Of course there’s numerous other time periods that haven’t been explored just yet, but I feel as if the Bronze Age would be an excellent fit for a title.