WoW's "Key Art" at Blizzcon '17 is Jaina Proudmoore

Well, here's more evidence for Kul Tiras as a major setting for expansion seven. According to WoWHead, the key art for World of Warcraft (the sort of "banner" that goes with each of Blizzard's major franchises) will be a picture of Jaina Proudmoore.

Jaina, while usually associated with Dalaran and the city of Theramore that she founded, is actually royalty from the island nation of Kul Tiras. Given her absence in Legion, where she left both Stormwind and Dalaran behind, it seems like the only logical place for her to go would have been Kul Tiras.

Thus, if she's playing a big role in the next expansion, we can be pretty confident (as if we weren't after the texture leak) that we're heading to Kul Tiras.

Beyond that, though, nothing is confirmed. But one can infer a lot. Jaina is of course one of the most powerful mages on Azeroth, and her homeland is a naval power, which would both link the expansion to fighting the Naga, as they are an aquatic threat and Azshara is the most powerful mage on Azeroth.

Nothing's confirmed, but the evidence continues to rack up.