It's unclear how big the location will be or what kinds of secrets and side-stories it will contain, but if Savathûn's Throne World is anything like Europa from Beyond Light or the Dreaming City from Forsaken, there will be plenty of interesting lore, collectibles, and more for players to find. Based on everything Bungie has shown off so far, it looks like the location will mostly consist of marshy swamp-like terrain contrasted by the shining Light-blessed glow of Savathûn's castle. The primary setting of the expansion has been confirmed to be Savathûn's Throne World, a plane of existence created by Hive magic where Savathûn and her brood reside. There's also a good chance that many important characters from Destiny 2 Year 4 will play a role in the campaign, such as Ikora Rey, Zavala, Osiris, Saint-14, Crow, the House of Light Kell Mithraax, the Cabal Empress Caiatl, and Mara Sov. It's likely that the The Witch Queen's campaign will address these questions as we move to stop Savathûn and her forces. Many fans theorize that she somehow stole it from the Traveler, while others believe that the Traveler chose to give it to her for a currently unknown reason. This is the first time that anyone other than the Guardians themselves have been able to use the Light in Destiny history, and it raises many questions about how Savathûn and her followers were able to obtain it. Savathûn is known for her ability to trick, deceive, and lie her way to victory through manipulative tactics, and in the expansion, she (along with her Hive followers, the Lucent Brood) will wield the Traveler's Light against Guardians. The core premise of Destiny 2: The Witch Queen has players facing off against Savathûn, the Witch Queen and the sister of Oryx, the Taken King, whom players encountered and defeated in the first Destiny game.