As a note, all of these activities have been leaked already through destinytracker.com 's database, it's just now that we know it is partially on disc. What's even worse is that you are able to glitch yourself into some of these places on Earth and see enemies in them.The first DLC will include 4-5 missions, 2 strikes(one on earth, one on Mars), 1 raid(on Moon) and 3 crucible maps.Second DLC there is less details but I assume again 4-5 missions, 2 strikes, and 1 raid(which takes place in the reef)If you want to see two of the locations of the DLC here is the Seraphim Vault https://www.youtube.com/watch?v=FmfY9Y7OYco and King's Watch https://www.youtube.com/watch?v=NaAOZKTMElc