Blizzard has confirmed that Diablo 4 has gone gold, meaning that the game's ready to ship ahead of its 6th June release date on PS5 and PS4. A few months back, there were actually some (unsubstantiated) whispers that the action RPG would be delayed to later in the year, but the date has stuck.
This is all following on from immensely popular closed and open beta tests, which the developer has used to adjust the game in meaningful ways based on player feedback.