oh im sorry i thought you ment the story took place in someones headFinal Fantasy VII - Wikipedia, the free encyclopediahow soyeah, like they actually planned the premise of Advent Children back in 1997. Everything in FFVII:AC was an afterthought. everything.
Basically, the idea to make Advent Children wasn't even thought of until several years after FFVII was released.Compilation producer Yoshinori Kitase said that when given the opportunity to expand any previous Final Fantasy title for the company's experiment in polymorphic content, he "immediately chose Final Fantasy VII", because of its status as a milestone in the series' history, its status as a reference in the series' style up until Final Fantasy XII, and its popularity among fans.
On topic, please no. This game will lose whatever integrity it has left if the remake has Aerith alive at the end.