In an interview with RPG site, Kitase pointed out that Final Fantasy XII HD and other HD remakes of FF games may be on their way:

"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.

What I can say though is that I hope the remastering of X and X-2 will trigger similar projects for more of the past games."