I've seen that artwork for old promotional posters for FFVII's release in the 90s, however it had the release date and other normal things you see on game store posters.
So, like I said, it's either specially made for Square and their premises, or it was another earlier variant that simply didn't have anything but the title. They're part of media kits and stuff that's usually never for sale.
Like this KH box display I have was from Gamestop back in 2002 a friend hooked me up with. These things usually get destroyed or trashed once their promotional period ends but sometimes if you ask, they let you keep them.
I wish I could have gotten the Remake stuff but someone in my area beat me to it