Marvel Super Heroes Secret Wars was a line of action figures and playsets, launched as a tie-in between Marvel Comics and the Mattel toy company. It was released in 1984 and discontinued in 1985.
The line was a reaction to DC Comics' 1984 deal with Kenner Products for the Super Powers Collection. Mattel, concerned about losing the DC account to Kenner, made a similar deal with Marvel. Mattel's request was that the line would be supported with an event comic book that included the words "secret" and "wars", which Mattel's market research found worked particularly well with children in focus groups.[1]
Marvel editor-in-chief Jim Shooter came up with the concept for a year-long twelve-issue crossover called Secret Wars, in which Marvel's most popular heroes and villains would be plucked out of their daily lives to a distant galaxy, where they would be given alien weapons and technology and forced to fight each other.[2]