I think this is a possibility! We know now since the new trailer and artworks shown at E3, that everyone of them has a different weapon equipped and therefore the potential of unique special attacks and battle stances. In my mind (the post about OW Midgar that I should have written 6 months ago), they were always part of the main party for "Episode I", together with Cloud, Barret, Tifa...AND AERITH! That sounds contradicting I know, but when it comes to the bigger changes, or more like, THE BIG CHANGE in the Remake, this could be one.
to be continued...
soon..
maybe...