Well at least that doesn‘t start until a few reveals in. We can be quite sure about the Americans, Brazilians and Chinese if they don‘t go with United States, Federal Republic and People‘s Republic instead. I actually expect the Americans to come in later in the alphabet, as United States fits quite well and Americans could go to eh Early Modern or Indutrial culture later.
But „insane“ choices, hmm. That for me could mean they are going with the states names as I listed them above instead of the cultures, that could mean controversial choices (Apartheid South Africa, North Korea, Israel) or he just means cultures we wouldn‘t classify as medium or world powers like Sweden (who is probably in) or the Emiratis (who again, I‘d like to keep in hand for the Future Era DLC - I‘m going to make it happen, guys

).
EDIT: So if we may guess the first emblematics as well:
Americans - whatever affinity is left - a Aircraft Carrier or a B52 Bomber - Mall
Brazilians - agrarian - whatever unit class is left without a emblematic - Sambodrome (Niemeyer Quarter?)
Chinese - Builder - Infantry (something with Red?) - Some kind of Factory or Agrarian Infrastructure (Dams?)
And that is also why I am excited for Humankind. In the other game, Modern Unique Units are bad and never matter. These here do, finally to get to know something about modern military. Also the other emblematics allow for fresh takes. I‘m looking forward to it.