Let be serious one moment and just try to analyse this sneak peak thoroughly.
We see a globe in front of a large library. But the books are in the background, showing that they're not important and we should not focus on them.
The globe is grey ; the color grey can be compared to the blue color (source: grey eyes can have blue reflects). Therefore, it's safe to assume that the globe is blue. But if it was meant to be blue, why is it not blue? In fact, in Antiquity, the color blue was very rare because very expensive (source: my elementary school lessons). Ergo and thereupon, we have there the proof that the civ is antique and not at all modern because if it would have been modern the globe would have been blue and not grey (evidence A).
Plus, the globe being blue (source: evidence A), the world is seen as a big ocean. Why a world would be represented by an ocean? The answer is clear: it's a link to the Flood cataclysm. But all folks have, at some point in their history, a Flood myth. So why make a globe out of it? Well, we have to face that it leads only to the conclusion that creating globes of the Flood is only to sell them as merchendise and touristic souvenirs. This is the proof that the new civ revealed will be a nation of merchants and, per se, navigators and travellers, because I do not have to prove why merchants are navigators (evidence B).
But take a look about the globe: it's atop books. What does that mean? Well, it's obviously a metaphor about the world dominated by words and knowledge. What is the main conduit of knowledge? Undoubtedly words (source: common sense), and words are largely, in our world and society, composed with letters picked from an alphabet (source: any text you can read, so don't bother me). The place of the globe is the proof that the new civ/leader is linked with some kind of writing and alphabet (evidence C).
We said that we should not focused on the library in the background, but it's safe to assume that you should not listen to me (source: this development), so lets focus on the library in the background. Books are unimportant, but not the shelves: they are in wood. It's not a coincidence and it's undeniably a hint about the civ having a link to wood. But which wood? Well, in fact, if you look at the flag of Lebanon, you can see that there is a Cedar on it. Cedar is a tree well know to give wood (source: my head) and wood is what the shelves are made of. Coincidence? I think it would be too naive to think so. Never underestimate Firaxis to generate clues everywhere (source: every tweet they ever made). So, since the shelves made of wood are incontestably a reference to the flag of Lebanon, we have the distinct and absolute proof that the new civ is near Lebanon, ergo in Middle-East (evidence D).
Now, looking at evidences A, B, C and D, we now know that the revealed civ will be an antique civ of merchants linked to some sort of an alphabet and based in Middle-East. Ipso facto, the only conclusion is without any doubt Phoenicia led by Queen Dido.
And another victory for logic.
(Yes, I'm speaking from personal experience here. 
)
. And the host civ would get 1 amenities... and meatballs, i.e. +2 food 
