Wildcard, the developer of Ark, claim it would "not take more than a few days" to set it up, but Sony aren't behind the idea.
"Look, it's a thing that everybody asks for and everybody wants to do, and we can't really say anything other than what it is. It's easy for us to do technically and it's just policy issues, and until that gets worked out we're not different than any other game, even the big games that want to do it. It's not really something we can solve on our own.
"If all those Ark players want to be satisfied and play together, these cross-network play policy things really need to get sorted out - and then we'll do it. We're really excited about it."
"Technically it's doable," added Stieglitz. "There's nothing preventing it. And yes, we have it running internally. We think it's cool and we would like to make it happen, so if the policies change we'd like to be first in line to turn it on. It honestly would not take us more than a few days to enable it."
Xbox One and PC owners can't currently play together as the Steam version is incompatible, due to it being a different build, but that will soon change. The feature is being rolled out when the Windows 10 version of the game releases in September.
For now the ball is in Sony's court.
Would you like to see cross play between Xbox and PS4 come to Ark? Let us know below or over in the forums.