Blizzard wants to implement cross-play for Diablo 4.
“We’re very excited about cross-play”, says executive producer Allen Adham against Telegraph. “There are technical details and details to work through with the first parties, but it’s our goal to get cross-play”, he continued.
Since the game is still early in development and PlayStation has recently made cross-play available for developers, we can almost certainly say it will come to Diablo 4.
Diablo 4 has been announced for PlayStation 4, Xbox One and PC.