https://wccftech.com/final-fantasy-vii-remake-demo-psn-listing-leaked-by-gamstat/

A Final Fantasy VII Remake demo has been listed on the PlayStation Network, according to PSN tracking website gamstat.

Obviously, no Final Fantasy VII Remake demo has been officially announced by Square Enix yet. That said, gamstat already managed to 'leak' the Resident Evil 3 remake ahead of CAPCOM's announcement during the latest State of Play. If gamstat pulled the listing from the PSN API, chances are it's real.