I'm going to wait a bit on this. They say each installment is suppose to be a full game. So I am personally expecting the world of FFVII to get massively expanded upon and maybe even use some of the lore from Crisis Core and Advent Children. That way, everything that is intended to be added will make it, instead of cutting corners to fit everything into a single installment. This could turn out to be a good thing, if executed properly. If the execution turns out good, we may start to see this more in the future.