Sony’s controversial PlayStation Network requirement for its PC games is once again in the spotlight after the company delisted the original Horizon Zero Dawn on Steam and the Epic Games Store and added the PSN requirement to the upcoming single-player remaster.
They're having one HZD listing, for both copies
If you buy it in 6 months you can still play the original release with no PSN and no remake changes, they just package the remake with it now on the store.