Ok I have perfected my ideal list for release, which hopefully intersects with Firaxis logic of choice...
America - Dwight Eisenhower
(for ww2 ruler and non controversial modern leader, as they are in short supply)
Inca - idk
(they don't have much to choose from
) (why Inca? because why Aztecs get to be first every time? also South America needs them)
England - Alfred the Great
(for sake of medieval, Anglo-Saxon England)
France - Louis XIV
(incredible personality and someone from early modern era)
Germany - Konrad Adenauer
(to promote Peaceful Non-Prussian Germany, and again: have some non-controversial modern leader)
Rome - Marcus Aurelius
(incredibly interesting personality)
Greece - Themistocles
(to promote maritime, trade-based Greece)
Italy - Caterina Sforza
(Italy not being here before is a crime) (bonus point: we need competent girls) (potentially teased in a trailer)
Russia - Dmitry Donskoy
(medieval Russia for the first time) (bonus point: avoiding topic of Ukraine, unlike Peter and Catherine)
Egypt - Hatshepsut
(potentially teased in a trailer) (we need competent girls)
Assyria - Shammuramat
(Assyria - filling Mesopotamian staple with civ absent from civ6) (bonus point: we need competent girls)
Ottomans - Kösem Sultan
(we need competent girls, very interesting character)
Persia - Khosrow the Great or Shah Abbas
(one Sasanian, one Safavid, no Achaemenids!!) (okay this may be my bias)
Ashanti - Yaa Asantewa
(we need competent girls, very popular civ proposal, we need non-Mali West Africa)
India - Lakshmibai
(we need competent girls, bonus point for not being Gandhi and defying stereotype of passive ascetic Indian)
Mongolia - Genghis
(sigh, no one can replace him)
China - some emperor of Song or Ming dynasty
(to justify scientific and naval focus; also dynasties not covered yet)
Japan - I'm torn between Meiji or one of legendary shaman queens, to leave samurai zone
19th civ - some crazy unpredictable wildcard, idk native Australians for example
So we have 19 civs, covering all staples and regions, one third ruled by women without pulling any desperate unpopular maneuvers (Catherine di Medici

Christina, that crazy Portuguese queen etc), a mix of all eras and personalities, very few stereotypes, fresh cast, 2-3 new civs, one rare comeback, and few veterans coming earlier this time... It is too perfect for me, Firaxis definitely won't do this - I have failed hard.