i'm going to put this out there,
What if the 12 are The Knights of the Round now there are 13. The head being the King
the 12 knight seal bahamut away and seal there powers in stones to protect the people if bahamut is to ever brake free.
Now what would have happen to the king(maybe turned into Odin?)
or posible he is bahmut?

on another note i do find that ffxiv and ffxi bahamut look alike
and i thought Eroza was part of the world what about the other countrys?