Btw I think there is Somali language used in trailer, which is quite interesting in my opinion. That could be possible hint to some faction.
When?
I only heard English, Portuguese, French and what I thought was Arabic (it was, right?) in the trailer.
Right now, I'm really hinting at something like this [I continue hinting at private companies sponsored by states] :
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Almost obvious sponsors:
1. USA and possibly Canada and the UK
2. Brazil and possibly South America (I really doubt it - if there's a Portuguese-speaking faction called "Brazilia" that kind of nails it down to a faction sponsored by Brazil alone. UNLESS something crazy happened by the time of the Great Mistake and Brazil swallowed its Spanish-speaking neighbours. There's something weird about Brazilia being the "most militaristic faction". That's not 2014's Brazil-like.)
3. France and possibly the rest of the European Union (with or without the UK - it would be sweet if Portugal were with Brazil but alas... how meaningless we are. And that's not really the point - in any case, we're probably at the bottom of the Atlantic by then, either because the sea rose or because our debt sunk the country deep into the ocean.)
4. "Egypt" or, more likely, a Pan-Arabic faction; as I consider private companies (even if state-sponsored) to be the players here, the lunatics behind the likes of Burj Dubai would likely build a freaking spaceship. They've got the funds.
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4 sponsors are left, according to what I read. Unlike with Brazil, the US, France and "Egypt", we just have to guess them, as there's no basis whatsoever.
However, I think the first two sponsors I'm putting here are very obvious, whereas the others are just probable.:
1. China - because, come on. Possibly joined by Japan and/or Korea, if Firaxis gets political and imagines a future scenario where the CP of China has given way for a Democracy and the Chinese, Japanese and Koreans work together with their common heritage as a background, à la European Union. Hence the Pan-Asian Cooperation...
2. Russia - well... come on, right?
3. India - if China's in...
4. I think it would be
politically debatable, to say the least, leaving Africa out of the getaway from Earth. A white/Asian (regardless of the specific characteristics of Brazil and the USA) dominant, if not "only", colony in the outer-space. That would be odd. If France, at the time of the Great Mistake (that's a Great Mistake itself) is led by Marine Le Pen she would be loving it for sure... So... yeah, an African faction has to be in. And it would be amazingly interesting.
South Africa, possibly joined by Angola and some other "technologically-capable" (for Africa) states/s? Wasn't there a Nigerian leader in AC? Well, Nigeria's pretty big, but if they're going for realistic and state-sponsored factions (unlike in AC) South Africa and Angola have to be in.
I wish we got to know more about the countries by the time of the Great Mistake. Maybe parts of Sub-Saharan Africa got on their wheels and grew to be a formidable power.