- “Is this region of the world represented?”
- “Is this time in history represented?”
- “Is this represented/revered in previous Civilization games or totally new?”
- We strive to have a diverse and varied selection of leaders, and it is also very important to us to include female leaders. Women are often underrepresented in traditional historical accounts, and recent scholarship has revealed more and more the fascinating and powerful women that lived between the lines of history textbooks. We also look for leaders whose history makes them particularly well-suited for a bonus related to new expansion systems.
Quoted from the source directly from them
Let's see the criteria:
Cree, Mapuche, Zulu, and Georgia directly fit the first criteria. Places in those areas were lacking or completely new as in the case of the Caucasus region. Also most of Canada and parts of Chile/Argentina have never been represented in a game before.
The second one is harder for me to pinpoint especially since they went really medieval in this one with Genghis, Tamar, Seondeok and Robert as leaders. One could argue that the Cree and Mapuche could start better in the ancient era, especially the former but still. I don't know if they particularly followed this one other than picking the alternate leader, Chandragupta, for India.
The third is easy. Korea, Mongolia, the Dutch, Zulu are definitely revered in previous games for obvious reasons. The Zulu more by the general public. One could say Scotland is a "Celtic" nation but for this instance I'm going to put it in the second half of newcomers with the Cree, Mapuche, and Georgia although, regarding the Cree, we were expecting a NA Tribe, but not one from Canada.
As for females we got three: Seondeok and Wilhelmina from classic Civs giving them a new twist and Tamar of Georgia which fits in with the new ages system.
These were the best choices to go with female representation from the above list, because it is my opinion, that most of the time they decided to go with a particular nation before looking at the different leaders. Georgia might of been the exception. I'm 99% sure that Shaka will be back and it would have also been hard to replace Genghis as well, although more possible.