Complete re-make - Keep the story, characterizations, mini-games, sidequests... Basically just give me FFVII with shiny new-gen graphics and maybe some tweaked gameplay (Materia system could be improved upon and expanded a little. I think all of the characters in VII are way too similar, none of them really have any advantage or disadvantage over the others so it'd be nice if they could mix it up a little - Maybe even focus each character towards their intended job class or something).

Add some optional dungeons and side-quests that tie into and expand upon all of the new stuff that got added in the Compilation games - Just enough to have everything make sense and not enough that it distracts from the main storyline of FFVII.

Even if it's terrible, I'd buy it. Even if they had to stick an M rating on it due to language with characters like Barret and Cid, it'd still probably sell more than the entire FFXIII trilogy has.