FFVIII, without a doubt.

X has been done to death with sequels, as has XIII, and XV has been done to death with dlc. XV has also had a movie and an anime, and VII has had loads of extra stuff too. And XII had RW.

But VIII and IX are the only ones from the ps1 era onwards that have had bugger all. Which is a shame because they're my #2 and #3 FF games.

An FFVIII sequel, where the characters are a bit older, would be great. I'd even argue that it could confirm that Rinoa = Ultimecia, but I know many wouldn't want that.

I can just picture an older Zell with a beard.