I think they already announce the 8 Civilizations in the trailer, more or less.
Korea was the scene with crowned Daughter noodding to Father.
Mongolia was the scene with Daughter as Keishig, saving Father from attacks.*
Netherlands was the scene in a cellar hidding (the map was dutch and go well with Wilhemina).
* : The archers in this scene have special outfit, that can be a hint for another medieval civilization.
All the scene go from ancient to information era. The thing is, I don't know all other scene will match.
• Daughter gives water to Father building a wonder. We see some mountains/hills and forrest/jungle.
I think this is going to be an ancient civilization from Anatolia. Temple of Artemis is the only wonder from ancient era added. This could be Byzantine, Ottoman or a new civilization like the Hittite. My guess will be the Byzantine empire.
• Father is going to fight in the Colloseum.
So... A new leader for roman civilization? Or maybe the Byzantine empire is going to be under Roman civilization? I don't know what to think about this.
• Daughter go to see her sick father with plague doctor.
For me it's going to be a renaissance italian city-state. They made a big link with the discovery of America in the next scene, credited to Cristopher Columbus. Even if he was working for Spain, he was from Genoa. Genoa was a rival of Venice, and I think they want some new civilization as well, so my guess is Genoa. Furthermore, Genoa and the Byzantine went to war. After this war, the economic crisis lead the downfall of Constantinople one century later.
• Daughter on a collpasing boat in a storm. Daughter on a boat look in her pocket telescope and discover America.
I don't know if this scene announce a new civilization (Portugal?), a new leader for Spain (Isabella), or just to make a link with Christpher Columbus to think about Genoa. It can be a way to announce the Inca or the Maya as well.
• Daughter let the french flag fly away to reveal the Statue of Liberty face.
Same thing from above: new leader for USA or France, or just to show Liberty (Libertas), which is a Roman Goddess to think about Roman again, or civilization of liberty, or a wonder civ from modern era or...
• The fall of a wall (the Berlin Wall?).
That could be every thing. From every leader of the Cold War from Stalin, Charles de Gaule, Churchill, or even after like Tito's Yugoslavia. That could be tricky: naming the actual Germany in Holy Roman Empire to add Germany with new leader.
Basicly, I'm going with Byzantine and Genoa. I'm not sure, but I think the trailer lead to this.