While Ala Mihgo might be next, that doesn't necessarily preclude zones in other areas. Heavensward honestly felt a bit light in that regard, especially since, while large by FFXIV standards the zones were ratther average sized and not especially impressive. And honestly they started all feeling the same. I could see Ala Mihgo happening at the same time as we get new zones in other areas, but that's only if SE gets their **** together and starts putting a decent amount of devs on content creation, instead of giving them an apparent shoestring budget.