Final Fantasy X|X-2 HD Remaster producer Yoshinori Kitase stated in an interview with RPG Site's Erren Van Duine that Square Enix may consider more high-definition ports from the Final Fantasy series if X|X-2 sells well enough.
[if we had to single out one of the vast number of Final Fantasy titles which we could make in HD, it would have to be.....]
We'll have to wait and see if these remasters are going to be successful, first. If they do well, I think this will pave the way for more of the previous games to remade in an HD sort of quality. I mean, if we had to single out one of the vast number of Final Fantasy titles which we could make in HD, it would have to be Final Fantasy XII.
Final Fantasy XII was released for the PlayStation 2 in 2006.
Final Fantasy X|X-2 HD for PlayStation 3 and PlayStation Vita are slated for release in Japan, the United States and Europe this year.