I recently found a creator who has some great ideas for potential future civilisations to be added to Age of Empires 4. He has many completed concepts and has a website here: Chilly’s Age of Empires IV Civilization Concepts (charlesniu.com)
jsut to bad he dosn’t do water :>
But yes his concepts are good and he also posts them here, but under a different username.
The Japanese from SA can be like that in concept…