Funny enough, Yoshida gave an interview to Steven Messner of PC Gamer last month after Fan Fest. Time travel might be back on the menu Ladies and Gentlemen.
"With the 10 year-plus history, we were able to tie up a lot of loose ends and with the climax there will be more questions that are answered and people will understand the reasoning behind a lot of things that have been present throughout the story," Yoshida told me. "With that being said, there are areas within planet Hydaelyn where we haven't explored yet. There are continents that have yet to be discovered, areas that have yet to be explored. There's possibilities there. And with the story of Shadowbringers, we learned that the Crystal Tower acts as a portal not just to the distant Realms, including The First and those that have been divided by the Sundered, but it can also allow us to travel in time as well so we can go back to the past and future as well. So there's still a lot of possibilities left."
https://www.pcgamer.com/final-fantas...ter-endwalker/
Didn't we just feed a certain crystalline tower an ancient soul brimming with power? Hmmm...