>FF XV was confirmed time ago
Yes, but the chances of it flopping are very very low. It doesn't need to sell much to turn a profit, and like Neptunia it appeals to the weeb audience. Have you seen a single publisher test the waters on Steam and stop afterwards?
Sega has been having a lot of success on PC so it's possible but it won't be for a little while.
Also, I like how stylish all the persona games look but I haven't ever played one, which should I emulate and should I start with SMT?