I wold almost guarantee they would make a port. If only because it is a classic move on Squaresoft's part. Any time they have a marginally successful game it is ported to at least three more consoles later on down the road. I first played FF IV the after years on PSP, then on my Wii and now it will be on the Vita as well. They did the same thing with Before Crisis, it was on at least two platforms and I think there is a Compilation of FF7 games coming out pretty soon as well. With the success of Dissidia I would expect it to be rereleased a cople more times since like the others it includes all the classic characters.
Probably by the time the next one comes out there will be a compilation put out to go along with it.