An unnamed source from within Sony has confirmed that a remastered version of Horizon Zero Dawn is in development alongside a possible multiplayer tie-in and DLC for the sequel, Horizon Forbidden West.
Horizon: Forbidden West – Review
Horizon Zero Dawn is getting remastered for PS5 - The Verge
PlayStation 5: everything you need to know about Sony's newest consoles - The Verge
Sony ready to 'attack' in holiday season with PS5, executive says
3 - Horizon Forbidden West
Is PlayStation really banning players from reselling their physical games? - Dexerto
PlayStation 5: everything you need to know about Sony's newest consoles - The Verge
Horizon Zero Dawn PlayStation 5 remaster reportedly in the works
A Horizon Zero Dawn Remaster/Remake Is Apparently On The Way And A New Multiplayer Game Too