Is Diablo 4 coming to PS4? In short, yes - N4G

You'll also be pleased to know that you'll be able to upgrade the PS4 version to the PS5 version of the game for no extra cost too.
You'll also be pleased to know that you'll be able to upgrade the PS4 version to the PS5 version of the game for no extra cost too.

Diablo IV - PS4 & PS5 Games

Diablo 4 release date and time: When does Diablo 4 come out?

Diablo 4' Is Live Now In Early Access — Here's Everything You Need To Know

Trader Games - DIABLO IV (4) PS5 UK NEW (INTERNET REQUIRED) (EN/FR/DE/ES/IT/PT) on Playstation 5

Diablo 4 release date and launch times

Is Diablo 4 coming to PS4? In short, yes - N4G

Is Diablo 4 on PlayStation? - Dexerto

Diablo 4 release time, file size and preload options

MW3 and Diablo 4 may be coming to Game Pass as early as next year

Diablo 4 (PS4) cheap - Price of $36.21

Diablo 4 PS5/PS4 Beta Added to PlayStation Database , battle net diablo 4

Diablo 4 PS5/PS4 Beta Added to PlayStation Database , battle net diablo 4

Diablo 4 Preview: An impressive prestige RPG that shows its age, The Outerhaven

In the latest Diablo 4 video the game looks different : r/diablo4

Diablo 4' Is Live Now In Early Access — Here's Everything You Need To Know