There were leaks a little while ago that suggested we'd be returning to the Leviathan. Google it. EDIT: Did it for you, here's a brief summary: Story: We return to the leviathan and discover the source of emperor Calus's power. This also has the first tease of the darkness enemies to be introduced in D3, and was also teased in the drifters lore entry about creatures on an ice planet that he found. Weapons: Rose, Hawkmoon, and Dark Drinker are all coming Activities: Just like how Jokers Wild had "Mamba" as a code-name for Gambit Prime, Penumbra has a code name "Dragonslayer" for it's pinnacle activity. A new game mode that blends puzzle solving with wave based combat akin to prison of elders, comparable to an escape room Now this comes from a source that accurately leaked many details about each release from the Season pass, but was mentioned as 'early plans' and of course is still a leak from an anonymous source so don't take it as gospel. We'll see in the next couple of weeks. There was also a rumour of a 12-man raid and some PvPvE stuff but that was likely added by 4chan.