Bungie have outlined events set to hit Destiny over the next month, including this weekend's Salvage (3 on 3) playlist and the first raid (Vault of Glass) that opens up on September 16. Other events like Combined Arms and The Queen's Wrath are given vaguer descriptions and less firm dates in September, while the Iron Hammer hits in October.
Additionally Bungie announced other things that will happen in the world of Destiny of the next while:
"These are only some of the surprises we have planned for you. Very soon, strange characters will arrive in the Tower with special offerings in hand. Public Events will erupt from the skies over your favorite destinations with greater frequency. And, Bungie will enter the fray with some bounties of our own for you to claim - if you can."