Quote Originally Posted by Yuella View Post
FF13's world was swallowed by Darkness and Lightning had to escape it at the end of Lightning Returns. hmm....
Separate universes. It's been iterated time and again that there is no connection between Eorzea / Hydaelyn and any other Final Fantasy world except names used as homage (well, beyond the normal "it's possible to traverse the Interdimensional Rift and visit other worlds," which holds true in all FF games).