Square Unix's Hajime Tabata has given the strongest hint yet that Final Fantasy XV is coming to the Switch in some form.
During a Twitch panel at Gamescom, Tabata - who served as director on the game - said:
You asked the question, what other things do we have planned in the future? We can't give you any complete, solid details right at the moment but for our policy writers we very much do want to move out and do as much as we can with the game, with the franchise. There's another certain console out there people may be thinking of; sounds little bit like you guys, your name, "Twitch"... I think we'll just leave it there.
Everyone on Final Fantasy XV, they love this specific console that sounds a lot like "Twitch" - you may want to think something about that in the future.
It's notable that this statement comes close to the announcement of Final Fantasy XV: Pocket Edition for iOS and Android; could Tabata be referring to bringing that particular game to Switch?
Getting the full-blown Final Fantasy XV running on Nintendo's hybrid system might be a tall order, so the Pocket Edition could be a more likely candidate. On mobile it will be divided into chapters, with the first being available for free. The controls have been simplified and the visuals have a cute look which is more in keeping with older entires in the series.