I see where you're coming from. Sony has been on radio silence for a long time and only giving fans small crumbs.
However, on the 20th anniversary in 2014, Sony had a pretty impressive showcase with it's Playstation Experience with a ton of first party games shown off, as well as some amazing third party titles (except for Square. Pretty sure that was the year they trolled everyone with FF7. Everyone was expecting the FF7 remake, and instead it was just a port of the original).
No reason why they can't do something similar this year.
In fact, I'm actually confident they will. I'm not sure it'll be a live show, but I'm confident we'll get a Playstation experience with a crap load of first and third party announcements.
As well as the 30th anniversary, they have the PS5 pro apparently releasing soon. What better way to convince people to buy a Pro than with some fantastic game announcements.