Sydney or another Australian city was not included as a city-state in the base game, because developers already had Australia in mind to be included in soon. Same for Warsaw and Poland
We can use this logic for other city-states absent in the base game: Budapest, Hanoi, Vienna, Bucharest, Bogota, Venice, Florence, Marrakech, Addis Ababa, Cuzco ...
So among the next most probable additions are: Hungary, Vietnam, Austria, Romania, Gran Colombia, Venice, Florence, Morocco, Ethiopia, Inca ... Considering that a European civ (Poland) has recently been included, we can to exclude Half of the list. My bets then between Vietnam and Inca, especially Vietnam, since we do not have any Southeast Asia civs yet, and this is a very civ requested by the players.
And considering the market appeal, I think a lot of people would buy Vietnam
We can use this logic for other city-states absent in the base game: Budapest, Hanoi, Vienna, Bucharest, Bogota, Venice, Florence, Marrakech, Addis Ababa, Cuzco ...
So among the next most probable additions are: Hungary, Vietnam, Austria, Romania, Gran Colombia, Venice, Florence, Morocco, Ethiopia, Inca ... Considering that a European civ (Poland) has recently been included, we can to exclude Half of the list. My bets then between Vietnam and Inca, especially Vietnam, since we do not have any Southeast Asia civs yet, and this is a very civ requested by the players.
And considering the market appeal, I think a lot of people would buy Vietnam