As He-Man and the Masters of the Universe was developed into a series, the staff writers at Filmation came up with a wealth of proposed story premises. Numerous episodes were never developed beyond the early stages. Showcased below is one of those abandoned episodes, alongside a title card that I have created to show what might have been. Please note that in some of these synopses Orko is still referred to as Gorpo, Evil-Lyn as Desira, and the Evil Warriors as the Masters of the Universe. The Sorceress does not appear to have been fully developed at this point either; with many references instead to the Spirit of Grayskull. Also, Stratos is a villain; much like he was in the early Mattel material. All of the original spellings (Tee-La, Beastman, etc.) are also retained for authenticity.
The unofficial cartoon guide to He-Man and the Masters of the Universe features many more abandoned episodes!
"Cave World of Zambor"
While on a routine mission in Eternia's swamplands, He-Man, Man-At-Arms and Gorpo are caught in quicksand and sucked into the underground world of the evil tyrant Zambor. His warlocks force the peace-loving Cave Dwellers to mine the deadly Power Rock for the Masters of the Universe. It is up to He-Man to put a stop to it.
* Legally I should say that Larry DiTillio did NOT write this episode. This is merely an example of how the episode title card might have looked.