Yeah, I mean... I dunno. On one hand you're right, but on the other I wouldn't get my hopes up that we will get anything besides indies and 3rd parties.
But whether a secret announcement is coming or not, I'm interested to see more on certain games anyways. I'm good either way
I don't expect any announcement that would upstage Deathloop, but we might get a first look at the GOT DLC, a few games added to the PS+ Collection, or maybe something about PS Now.