We've gotten a few more videos in the last few weeks. I'll just leave a link to the playlist to reduce load times on this page: https://www.youtube.com/playlist?list=P ... 0-dawYWmkg
All of the Civs are going to be incredibly powerful in this game.
The Aztecs are again led by Montezuma, whose warrior unit can convert defeated enemies into builder units that have the unique ability to speed the construction of districts. Also, their unique luxuries can provide extra amenities and increase the fighting power of their units.
China gets builder units that can speed up the construction of ancient and classical era wonders, and they get extra progress from Eureka boosts.
Japan is well-constructed for island maps, with their districts gaining extra bonuses for being next to each other. Their units are also stronger when they fight near the coast or in shallow waters.