Everyone is thinking the next expansion will be Dragon Isles or World Revamp, but nearly everything is leaning towards the Emerald Dream. I mean, I know some people talk about "Gardens of Life" and "Lifelands" as a possibility, but the cosmic chart already has a plane for life, and that plane is the Emerald Dream,
ofc the Emerald Dream could be just a small part of "Lifelands", but the point still stands.
We should also not forget that the Dragon Pack other than the Blinky,
which is a faerie drake that fits into the Emerald Dream biome, are all old models of drakes already used on past expansions. Also, the encrypted drake is what?
An Emerald Drake!
With that in mind, the open-ended B plot of Shadowlands is about Elune, Tyrande, Ysera, and the Night Elves, which again are all somewhat related to the Emerald Dream. Alongside that, in 8.2 we learned from Merithra that the Emerald Dream is still being attacked by the forces of the Void:
Not to mention that "literally" everything that was added in the shop since Shadowlands came out, including Blinky and the unknown Emerald Drake, fits into the Emerald Dream aesthetic/biome: