The dive into the hidden history of the MonsterVerse through the Apple TV+ acclaimed original series Monarch: Legacy of Monsters has come to its explosive season finale. After reuniting with Keiko in Hollow Earth, the region inside the planet where Titans roam freely and time slows down significantly, the group returns to the surface. However, this comes at the expense of Keiko's longtime friend, Lee Shaw, who heroically sacrificed himself to ensure the others could go home. Back on the surface, the groups were recovered by Apex Cybernetics, who had their own agenda on Skull Island.
Source:https://www.cbr.com/monarch-legacy-of-monsters-finale-chris-black-matt-fraction-interview/