John Blackstar and Heman

John Blackstar and Heman is an animated crossover film, based on two animated TV-series, Blackstar from 1981 and Heman and the Masters of the Universe from 1983–1985.

Story
Overlord and Skeletor join forces to conquer both Eternia and Sagar, and must be defeated by Heman and his friends together with John Blackstar and his friends.