What we know:
1. Babilon focused on science. Hammurabi confirmed:
2. 6 new City-States one of each type (Babylon replacement C-S not included?).
Ashan - Scientific CS.
3. 24 new Great Peoples (no new GP type).
List:
Margaret Mead Atomic Era Great Scientist: activated effect (1 charge) Grants 1000 Science and Culture on standard game speed.
Rumi Great Writer Medieval Era
4. New Heroes will be GP on steroids. 12 new Heroes
5. Heroes are unique and can belong to only one civilization in one game
6. Hero discovering: when exploring the map and interacting with City-States unlocking Hero Devotion City Project in a City with Monument.
7. You grain a hero for a certain number of turns (Lifespan)
7. When dies or expired leaves 2 relics. An epic one, and a symbolic one. Those relics provide buffs for the rest of the game. Monuments have two new heroic slots now.
8. When the hero dies or expires you can resummon him for Faith.
List of heroes:
1. Hercules
2. King Arthur
3. Beowulf
4. Maui
5. Himko
6. Oya
7. Hunahpu and Xbalanque
8. Monkey King Sun Wukong
9. Mulan
10. Anansi
11. Hippolyta
12. ???