I anticipate DQXI breaking one million on the PS4 and the 3DS. Japan is still big on Dragon Quest, and I'm sure they've been aching for another offline, non-remake. The 3DS version appeals to the highly mobile gaming culture of Japan as a whole, while the PS4 version will be big, beautiful, and lapped up by tons of PS4 owners. Odds are, it will be a system seller in Japan.
As for FFXV, I can see it going either way. The development process has been careful and more transparent than many others, which may aid in trust in the final product. That said, FFXIII failed to break two million, and the sequels just saw further declining sales. The remasters have hardly been heavy hitters, and trust may be waning in the series as it continues to grow in western prominence, but decline in Japan.
That aside, will FFXV break one million? Definitely. I think the real question is whether or not it will break two million, and unless FFXV is very good, I don't think it will.
