Masters of the Universe (sometimes referred to as He-Man or She-Ra, or under the acronym MOTU) is an American sword and planet media franchise created by Mattel. The main premise revolves around the conflict between He-Man and Skeletor on the planet Eternia, with a vast lineup of supporting characters in a hybrid setting of medieval sword and sorcery, and sci-fi technology. A spinoff series revolves around He-Man's sister She-Ra and her rebellion against The Horde on the planet Etheria. Since its initial launch, the franchise has spawned a variety of products, including multiple lines of action figures, seven animated television series, several comic series, video games, books, magazines, a daily newspaper comic strip, and three feature films. - Source: Wikipedia