The sixth zone in 5.0

[Cilia]

If I remember correctly, there is only going to be one Job Quest at Lv80 (though it'll be longer than usual); the rest will be filled by "Role Quests." One reason for this was because bouncing back and forth between the Source and the First every few levels would feel incredibly disjointed and break up the pace of the story. (The other ostensibly being to reduce the load on the writing team.)

Me? Well, I'd like a really eldritch place as the sixth zone; something like IX's Memoria, the innards of Sin from X, or XI's Al'Taieu or Promyvion areas. Given how little we actually know or understand about the central conflict between Zodiark and Hydaelyn I'd very much like a Memoria-type dungeon / area over the others, as not only would it be really cool but it could be used to neatly explain a lot of those missing details.

... assuming there even is a sixth zone.