So maybe in chapter 5 they will actually steal Dalaran and they will fly it somewhere ... maybe to a desert, who knows. Seems like a possible scenario :) They could also crash-land in a desert by accident, being it Dr. Boom who is in charge of technical side of the heist and we all know how short of a lifespan his inventions have :D
I definitely wouldn't count out something desert-related. Remember this year's expansion teaser image:
The middle one definitely has a desert-y LoE vibe in it.
yeah that reminds me of the desert area where c'thun is and stuff. I hope it is as we'll likely see a lot of elemental's and that's what shaman needs right now IMO. I mean shaman is great, but we could have more elemental support, it's the only archetype that is currently lacking and I'd be in my element if this were the case (pun none intended)