Sony could be working on a remastered version or even a remake or Horizon Zero Dawn, a game released on PS4 some years ago, for PS5. The information has been extracted from a leaked document filled with PlayStation projects. Some of those titles are unannounced by Sony and between those games the refurbished version of Zero Dawn was listed.
The new version of Horizon Zero Dawn could include new accessibility features, quality of life changes and graphical modes to update the game to the level showed by Forbidden West.
Moreover, there are Horizon multiplayer projects in development.