What would a Final Fantasy 7 remake sell?

[Sky Render]

Remakes only very rarely surpass their originals in sales (usually when they're released in a region that the original was not), for the simple reason that most people don't want remakes. They want entirely new content, preferably compelling content that holds their interest and differentiates itself nicely from that which precedes it. As such, while an FF7 remake would sell fairly well, it wouldn't come even close to the sales of the original version.