There's been speculation they'll do something for P2's anniversary come the 13th of August, so based on that and the countdown it's easily that.
What though, god only knows... The audio does go on for quite a bit in the background, but doesn't really say anything thus far... You can at least guarantee that with this level of hype they're not going to do something so lowbrow as "Hey! It's our birthday so here's a little party hat you can wear on your mask!" though.