My 2 cents:
I think Ratchet will get a trailer with the female Lombax. And I think Returnal might not show up. Though a deep dive for that will make sense.
There will be 2 new game announcements only, but besides the rumoured Silent Hill as a possibly, I don't see either being Sony titles, unless they are Concrete Genie-esque releases. I guess Factions 2 is always possible.
I wouldn't be surprised if 2 of the games are Destruction All Stars and Sackboy, both getting new content.