What the title says. 5.1 was integrated nicely into Krasarang Wilds (unless you're a local Saurok not happy with the visitors). 5.2 has its own new island. But where will 5.3 happen? I guess the almost-destroyed Zandalari homeland is a possibility, but it seems your effort in 5.2 pretty much closes the final chapter of the Zandalari.
If the Sha of Narrative Convenience is finally revealed in 5.3, I guess they could build a new area/modify another part of Pandaria to deal with it. But I tend to think that if 5.4 is the Siege of Orgrimmar, then 5.3 is going to be leading into that.
So ... Kul Tiras? I don't know, just curious what everyone is thinking.