As hard as this is to believe, originally at the end of "Dawn of Dragoon", the villain was supposed to "die" by falling into the Bottomless Hole of Trolla. Amazingly, this scene was storyboarded, and I know for a fact that it was animated, too, having seen cels from the sequence over the years! This scene was hurriedly reboarded and subsequently animated before the episode aired! The scene in the completed episode where He-Man manages to save Dragoon compliments the values of He-Man and the show itself.
(click on the image to see it at full-size)