https://wccftech.com/playstation-5-wont-have-backward-compatibility-with-classic-playstation-games-jim-ryan-confirms/

The PlayStation 5 will not be compatible with PlayStation 3, PlayStation 2, and PlayStation 1 titles, Jim Ryan confirmed.

After months of rumors and speculation, the PlayStation CEO confirmed to Famitsu, as translated by Siliconera, that the upcoming next-gen console will only be compatible with PlayStation 4 games.