EA Announcement Tomorrow 9/27

It says "meet in real life", so it sounds more like they're planning either a physical EA event or a competition to win a trip for multiple people rather than talking about any in game feature like multiplayer. I would guess it's either EA play, the return of Sims Camp or potentially the Summit could be a real event as well as a stream. If Sims 5 is going to be announced soon maybe they'll do an event for select people to try a part of it early (like the Sims 4's CAS demo)