"Starting Wednesday, 6th June at 4.00pm BST/5.00pm CEST, join us at live.playstation.com, Twitch, YouTube, Facebook and Twitter as we count down to E3 with new game announcements and updates each day leading into Monday’s Showcase."
From the PlayStation Blog
Can't imagine they'd announce much before e3, but might be something interesting I guess. Hopefully they schedule the announcements beforehand and tell you when they're going to happen, cause there's no way in hell I'm going to hang out in a stream like I did with the Fallout 76 stream. xD