Not old. Expanded and rethought, yes, but not old. It’s basically the Plaguelands. And on to your question. If you buy ShadowKeep that includes the current season, so I’ll include that too. So far we have: [u]Exotics[/u] -At Least 3 new armor exotics -Monte Carlo, Eriana’s Vow handcannon, Leviathan’s Breath Bow, An Exotic Machine Gun skin to a linear fusion rifle that fires instantly, The Void Rocket launcher that is the Child of Gjally and Nova Bomb. [u]Activities[/u] -2 new strikes (3 if you include the fact that Brood Queen Strike is coming to all platforms) - A dungeon (No details as of yet) - The Raid, Garden of Salvation - The Vex offensive -Nightmare hunts - 3 new crucible maps [u]Other stuff[/u] -New Iron Banner Armor -New Universal Ornaments from Eververse -New Armor via the season pass (I think) -Moon destination weapon’s (crafted via nightmare essence) -raid set weapons -Raid Armor That’s all I’ve got at the moment. And that’s not even mentioning the new Sandbox overhaul, Crucible labs returning, and Armor 2.0.

Keep up and read the TWABs. They literally tell you what sort of activities they're adding.

Only 1/3 of the moon is "old", and they've retooled it to fit into the current timeline and have opened up more things to do. There will also be a new story, loot, crucible changes, a dungeon, raid (as you said), and probably a bunch of secrets and exotics, not to mention what comes with Season of the Undying. They don't want to just show us everything before launch though