They can always try again. Square Enix is doing that with Dragon Quest, why not Atlus?
Which PS4 games will fit for the NX though, if it is a handheld? The bigger ones, I already expect to remain on NX, like MonHun, Pokemon and Yo-kai Watch.
People are talking about FFVII: R which sounds crazy to me because if NX is a handheld, I don't see it. Same applies to the PS4 version of DQXI. A game like Project Setsuna and WoFF will likely end up on NX. Basically any of the Vita/PS4 release should be plausible but not something like FFVII: R and DQXI. I only listed them because they are the ones that are brought into discussion when it comes to NX.
If it was not clear before, I am talking about NX as a handheld, not a console. Because lets face it, if NX is a console, it is already dead in Japan.