Actually a decent 4th age would mostly be in the past, Cold War, Globalization, Computers, Automation, Social Media…it should only have 1/3-1/4 in the future.Since the 4th age would probably go from the present into a bit of sci-fi, I'd like it if they made the Civs based on prior sci-fi games by Firaxis - like the 12 sponsors from Beyond Earth. No future leaders necessary; just the civ icons and some flavor abilities.