A few years ago I made a thread about a North Amerian DLC suggestion (sorry of the typo, can’t fix it anymore).
I might revisit this after the next DLC releases and I know how they will handle the Shock Infantry class, now that it’s not exclusive to the Eagle Warrior line.
The new Chinese DLC seems to add even more unique and regional units then Dynasties of India already did so it wouldn’t be to crazy to design civs with 2-4 regional units and 1-3 unique units.
They also added regional buildings with the last DLC so that’s something hat isn’t too crazy now.