If there was a sequel, I think it'd have to give more attention to the secondary characters. Quistis in particular was horribly neglected in the original.
I'd like to see a little more about Zell and Selphie. Also if Zell goes out with the Pig-Tail Girl! ^.^

i'd want it to focus mainly in on squall/rinoa/seifer.
Me too! Maybe we could see Seifers thoughts about the past and his outlook on the future. Also I'd love to see Raijin and Fujin and him try other activities. (like the fishing scene, LOL!)