Yeah, I more or less agree
Btw, I made an ordered list for 50 civs a few days ago, this is a slightly modified version of it:
Based mostly on historical importance, but heavily taken into account popularity and uniqueness too (and appearance in previous civ games to a little extent):
1. Sumer
2. Hungary
3. Portugal
4. Khmer
5. Poland
6. Kongo
7. Phoenicia
8. Indonesia (Majapahit or Srivijaya)
9. Sioux
10. Hittite
11. Sweden
12. Morocco (representing mostly the Almohads/Almoravids, but Al-Andalus too)
13. Khazars
14. Mali
15. Assyria
16. Zulu
17. Apache (or another important native american civ: Navajo, Comanche, Cherokee, etc...)
Some of these are kinda close to one or more already released civs, but in those cases historical importance and popularity is dominant enough - at least for me
Also from these civs, quite a few are popular enough to be released as DLC:
Zulu, Sumer, Portugal+Kongo, Hungary+Poland (with a real medieval scenario), Sioux+Apache. I expect some of these will become availeable even in this year
Hopefully we will get most of the remaining ones in a second expansion