Some Interesting Concept Art I've Found.
Kekai Kotaki hasn’t been working for ANet for a long time, so he won’t have created anything in specific for Living World Season 2.
Or course, this doesn’t mean that some of his old pieces which haven’t been utilized so far won’t be made use of in the future, but what we can say for certain is that there’s no point in trying to speculate based on things he drew.
By the way, the second image is most likely an early rendition of the Shadow Behemoth world boss in Queensdale.