It's impressive how wildly inconsistent their socials are. When they first announced the Unlocked they said there was going to be Planet Zoo news. Now, on the day of the stream? The PZ socials shared a link to the stream but the posts don't mention the fact that there's going to be news for Planet Zoo players. Just that it's the first Unlocked of the year.
The Elite Dangerous post was similar (except they got those live drops or whatever). In contrast, PlanCo gets a "sneak peek of what's coming up in Update 3?

"
Based on this I'm now
really thinking all we'll be getting is info about the next round of console DLC, maybe a reference to the remaining packs being released for console later this year, and a reminder for PC players that we have at least one more DLC coming ("but we'll have to wait a bit longer to learn what that's all about" or something).
EDIT: Never say never, obviously, but I was just sharing this to try and set expectations as some folks seem to think it's a foregone conclusion that we'll be getting a teaser.