I do think it's pretty inevitable that a remake would have to include a lot of the stuff introduced into the mythos by Crisis Core (and maybe some of the stuff from Advent Children and Dirge of Cerberus), because Nojima seemed hell-bent on setting things up for some new FF7-2 story. But the Complication of FF7 (i'm calling it that deliberately because i'm hilarious) is basically dead in the water at this point, it's pretty clear.
If they *did* remake FFVII, they'd likely make FFVII-2 afterward, and given the way they're handling development and resources these days, we'd have to settle for that instead of getting a generation of *new* FFs.
I wonder if people are aware of the fact that the game would play really differently and likely have a really different tone from the original.