There are now rumors that this isn't going to be EXACTLY the same game...so it's possible they will incorporate plot elements from the spinoffs, or go in new directions altogether. I can't imagine they would change THAT much, but they may streamline some things to make the game seem less repetitive at times, perhaps removing the need for grinding, etc.
...but I swear to God, if they remove Aeris' death *spoilers for a 20 year old game* I am going to flip my shit. Too many people have a hard on for Aeris and her death was "too much"...forget them. Her death was amazing and needs to be kept in.
And for anyone who brings up phoenix downs...PDs revive KO status, NOT death.
Sorry. Had to get that off my chest.