There might be other Final Fantasy franchise tie-ins coming to Eorzea in the future, including something to celebrate the launch of FFXV. “We’d love to explore opportunities within other Square Enix titles so we can explore their worlds, but it’s important not to deviate from what we’ve established as Eorzea,” Yoshida explained. “So we’ll always keep both titles involved intact, but it’d be cool to explore.”
Final Fantasy XIV someday. In an IGN interview, Game Director Naoki Yoshida said that he’d spoken with Square Enix’s Yoshinori Kitase, producer of Final Fantasy X and X-2 from whence the popular underwater sport originates, about it adding into A Realm Reborn. While it is definitely not a done deal, Yoshida admitted it is a distinct possibility.
Source: IGN interview