DC Showcase: Kamandi: The Last Boy on Earth!

Kamandi, Prince Tuftan of the Tiger Kingdom, and the humanoid mutant Ben Boxer are abducted by a gorilla cult devoted to locating the reincarnation of their god, The Mighty One. Golgan, the cult's leader, puts Kamandi's group through a series of deadly tests to determine which of them knows the secret of The Mighty One.