A sequel wouldn't quite work ('cause, what's left to tell?).
What would make a decent adaptation of the game into a film, is a prequel, the history of Edea and Cid / or Ultimecia's past / or the whole Adel story.
![Roll Eyes (Sarcastic)](https://www.ffnet.net/forum/images/smilies/rolleyes.gif)
I would love to see a Laguna flick, but as good as everything is told withing the game.