As I mentioned above, there's no reason for the PS4 version to exist unless it's coming Westward. SQEX is localizing Star Ocean 5 and Nier 2 - they're obviously not going to skip a AAA DQ. A vetted NeoGaf insider who works for Sony also confirmed all PlayStation DQ games are coming West.

Not to sound paranoid, they're either baiting a social media fan campaign for the free advertising or saving it for a fan event like PAX or PSX so SQEX/Sony can act like the benevolent kings who heard the cries of their peasants.