Okay the sorceress Idea is okay but where and how would you go from there from the ending of FFVIII?

And I dont really think there should be a FFVII sequel as well but things did need ot be explained.

But FFVIII does not need a sequel. I think that should be lead up to Fanfics. You can do anything witht that, anything of your desire. If you want to explain what happens after the end in FVIII good for you.