Well, somewhere soon we know Sony will make the full reveal/extra info of Death Stranding Director's Cut and Ghost of Tsushima Director's Cut. And obviously, they will reveal the Horizon 2 release date and to show the first GoW gameplay. And there's the Bluepoint purchase an possible MGS remake announcement which can be tied with the first MGS movie trailer and even with the Blue Box thing.
So if this week they will make a State of Play for 3rd party games, a few weeks later there must be at least another State of Play more (Sony said there will be more updates) to talk about 1st party and 2nd party stuff. No need to be an insider to know this.
Seems this 'insider' saw the PS Blog Sony published today mentioning GoW and Horizon 2 won't be in the State of Play of this week but instead to wait for more updates coming soon this summer.
I don't see why Sony don't come out and give a date for their next gaming event. With Microsoft and Nintendo already done, they have the floor all to themselves.
They did it today: announced a State of Play for 3rd party games, and specially focused on Deathloop, for this Thursday.