3. ‘Masters of the Universe’ (1987) — Sequels That Never Happened
Spoiler Alert: The live-action 'Masters of the Universe' movie ends with Dolph Lundgren’s He-Man defeating the evil Skeletor (Frank Langella) by throwing him into a pit of doom. The credits roll and all’s right with the world. But then, Skeletor pops his ugly skull out of the boiling waters and he tells viewers “I’ll be back!” (Watch him say it in German above. You can watch the actual scene here.) There was never another feature film, so presumably bone-brain was referring to the 1990 cartoon 'The New Adventures of He-Man.'