Even though the first four games have been ported to Sony portables
Disgaea 1 and 2 were ported to the PSP, and Disgaea 3 and 4 were ported to the Vita, allowing handheld gamers to enjoy the series. Unfortunately it doesn’t look like the PS4-bound Disgaea 5 will get that same treatment — at least, not anytime soon.
Speaking to Dengeki PlayStation magazine, Nippon Ichi Software president Sohei Niikawa informed the public that a Vita version was essentially not possible due to how much they would have to compromise the PS4 version. Elaborating further, he stated:
I know that there are many consumers who would like this. However, we are developing the game with PlayStation 4 specs, so to be honest, it’s impossible to port the game to the PlayStation Vita. Porting the game without erasing a lot of features and cutting down the amount of assets would be very difficult, and of course, we do not wish to do that. I think there are people waiting for a “Return” version with all of the contents [and DLC] included, but I’m sorry, that will not happen this time. (laughs) If we were to port the game to a portable system, fans would probably have to wait for the next portable system after the Vita, but I haven’t heard anything about this [system], so that would be far in the future. Disgaea 5 will have Remote Play. Do not wait for a PS Vita port, and please, play the PlayStation 4 version.
That doesn’t mean a port will be impossible, but unless NIS can fit all of that content on the Vita format or compromise enough material to justify it, I wouldn’t hold your breath for a port until the next PlayStation portable.
NIS President: ‘PS Vita Version of Disgaea 5 is Impossible [Anime News Network]