Beta early access period is July 18-20, 2017 on PS4™ system and July 19-20, 2017 on Xbox One. Open Beta period for all consoles is July 21-23, 2017. PC open beta and early access to follow in August.
Bungie has, via social media, shared a tease for Destiny 2. You can see it below. No release date nor any details emerging so far, but expect to hear something very soon, probably at E3?