In the expansion's announcement trailer, we heard Ikora Rey describe Osiris - her mentor - as "the most notorious Guardian in Vanguard history". Osiris is investigating the Vex in the Infinite Forest, which is a simulation of the past, present, and future. Players will also be able to travel to the Lighthouse, the social space on Mercury that was previously exclusive for players who had gotten nine consecutive victories during a Trials of Osiris run.
The opening or gate to the Infinite Forest is on Mercury.
Bungie admitted that the Raid Lair is "not as lengthy as the original Leviathan" and will provide new Raid armour weapons and cosmetics to earn.
Bungie also confirmed that Destiny 2's second expansion will also feature a new Raid Lair when it launches sometime this coming spring. Called Leviathan, Eater of Worlds, it takes place on Calus's ship - like the existing Leviathan Raid - but is set in the mechanical Underbelly areas near where you go chest hunting rather than the palace explored in Leviathan.
"We're learning from and listening to all the feedback we got on Destiny 1, and we're applying it", Ward noted. Once you finish the campaign you'll be privy to many of Osiris' secrets, one of which will let you build weapons that incorporate Vex designs.
Bungie Details Destiny 2 Curse Of Osiris's 'Infinite Forest' And 'Raid Lair'
Bungie also revealed that the Heroic Strikes playlist will make a return.
Destiny 2 has gotten off to a much better start than its predecessor, but as longtime Guardians know, the Destiny experience is nothing without a steady stream of new content and experiences.
Two additional "Curse of Osiris" streams will be offered by Bungie ahead of the content's release on 5 December. It will have a Prestige mode, if you're the tough type.
During today's Destiny 2: Curse of Osiris' first major live stream, Bungie revealed a new activity that will supplement the current Leviathan raid. Bungie plans to share more details about the new expansion activities we can embark on then.