Bungie.net is the Internet home for Bungie, the developer of Destiny, Halo, Myth, Oni, and Marathon, and the only place with official Bungie info straight from the developers.
Destiny 2's 30th Anniversary Pack has a lot of fun, and the DLC page on Steam promises "a new dungeon, exotic Gjallarhorn rocket launcher, Thorn armor set, and an arsenal of weapons, gear and cosmetics inspired by the past." by Bungies.