It would star every single female Final Fantasy character in existence with the ability to put them in any costume you want with all the worlds in it to explore like never before and dialog options because I like dialog options. Yuna would be able to ride Valefor, jump off its back, draw her dual pistols from X-2 and shoot people while free-falling through the air and Tifa could punch through walls and hit a bunch of combos and a bunch of other stuff that would make my eyes roll in the back of my head.