It seems you're referencing a crossover event or a potential storyline between Hercules: The Legendary Journeys and Xena: Warrior Princess . While there is no official film or episode titled Hercules and Xena: The Battle for Mount Olympus , the closest canonical crossover is the two-part episode "Armageddon Now" (Xena season 4, Hercules season 5), which involves a struggle for Olympus and the release of the Dahak storyline.