
Originally Posted by
AnimaAnimus
There are many reasons this wouldn't work and as someone who has played XI for nearly 20 years and XIV since 2010, it would only be shallow fan service.
But just to cover a few things. If you look at the first, the geology is quite similar to Eorzea, in fact its pretty much an exact replica, Quon is completely different from a continental perspective so some pretty devastating geological events that have never been spoken of in XI would have had to taken place in the 10,000 years since the Zilart fell for it to change so drastically. Not to mention they also have their own Hydaelyn and Zodiark in the forms of Altana and Promathia, the former being in peak power and the later of which we already dealt with. Then we also have alternative timelines to deal with, like the Abyssea timeline in which Promathia (or Zodiark) would have killed us and reigned supreme as Shinryu and the timeline that was created/erased via the Rhapsodies expansion. And that is only naming a few things that would be hard to explain. The Zilart and Kuluu, while being relatively similar as the Ascians, as also different enough for their respective lore not to overlap smoothly, if at all.
Just using races as an example doesn't quite fit, there would need to me many more connections. Incorporating all of the Vana'diel lore, which is much much more intricate than the XIV lore, would be a complete mess and nearly impossible to do without retconning one of the games lores in it's entirety. If Yoshida wanted to just make Vana'diel a shard of Eorzea, not only would he have to be creative in a way that I feel is beyond his capabilities, but it would do a complete disservice to XI and the franchise.