They have so much IP they could draw on for a new story, for instance going to Spira and fighting Sin or something like that.
Actually outright doing other worlds like that tends to be more Raid territory than main scenario, but I do acknowledge all the recurring themes they put into Eorzea's world.
Garlean Magitek looking straight out of FFVI
The Crystal Tower of III
Liberating a conquered (rather than wiped out) Doma, complete with Cyan/Kaien's theme
Going to the Moon, when the "Poster Boy" is decked out as a radiant Paladin.
Actually outright doing other worlds like that tends to be more Raid territory than main scenario, but I do acknowledge all the recurring themes they put into Eorzea's world.
Garlean Magitek looking straight out of FFVI
The Crystal Tower of III
Liberating a conquered (rather than wiped out) Doma, complete with Cyan/Kaien's theme
Going to the Moon, when the "Poster Boy" is decked out as a radiant Paladin.
And that's hardly touching the surface really.