Okay, this is a what if. I'll be using tvtropes links for some clarity

Anyway I've been thinking that between the games that feature multiple worlds as a plot point (Kingdom Hearts, Bravely Default, V and the XIII trilogy), this theory and that FFXI did an AU campaign. I wonder if there's alternate versions of Eorzia? world and timelines that seem similar but have drastic differences.

In particular I wondered about an alternate Eorzea where the Primals or a villain with certain ambitions would have succeeded in tempering the city states. Or one with an evil version of the PCs.

Are alternate universe possible? And what would happen in these hypothetical Eorzeas?