Everyone! There is new information regarding the Titan Leviathan. In the Prophecy dungeon Eris says “ The Hive nest there, in the ruins of the Golden Age. And a leviathan of untold strength has made it her home.” referring to the New Pacific Arcology. This is an actual in universe reference to the Titan Leviathan. That means Bungie hasn’t just written off the leviathan as an easter egg.