Ten characters:
The "going that far" part seems to me to be almost literal: we traveled to the edge of the universe. That's further than any FF game has before, and we've gotten an absolutely massive view of the universe of FFXIV. Before EW, one bit of speculation was we might go to the Dragonstar as the next chapter in the story, but we've (functionally) gone there and beyond.
As for what comes next...
I am personally not a fan of threat escalation in storytelling, so I hope they bring things "down to earth" a bit more, and doesn't try to top what's already happened. I think this can be done well, as one of this game's strengths are when it tackles characters and interpersonal conflicts. I personally wouldn't mind a series of smaller, shorter anthology or episodic stories, rather than another sprawling epic.