A Brief History of the World's Greatest Super Heroes 8 Inch action figure.
Worlod's Greatest Super Heroes Trading Card Cover

1972 Outfitting Action Jackson bodies with new heads and familiar costumes, Mego creates the World's Greatest Superheroes. The first tests were sold for Christmas at New York area 5&Dime EJ Korvetttes. The line comprised Superman, RC Batman, RM Robin and Aquaman in solid boxes.

1973 Three new heroes were added for the fall season Spiderman, Captain America and Tarzan. problematic solid boxes are replaced by retailer-friendly window boxes as well as "Kresge" cards.

1974 A big year with the addition of the Supergals Assortment which included Supergirl, Batgirl, Wonder Woman and Catwoman and the Superfoes Assortment featuring Riddler, Mr Myx, Joker and Penguin. Shazam also arrives to give a hand. 1974 saw the release of the Batmobile, Batcopter, Cycle and Batcave Playset as well.

1975 Here come more Marvel heroes! Hulk, Iron Man, Lizard Falcon and Green Goblin released. Fist Fighters (Batman, Robin, Joker, Riddler) launched

1976 O Mighty Isis arrives as well as the Fantastic Four, Thor and Conan..

1977 The Teen Titans arrive. 1977 sees the departure of Tarzan and Wonder Woman from assortments and Mego switches from Window boxes to Blister Cards

1978 No New Releases. The Card artwork changes but no new heroes are released .

1979 More Heroes Dropped. Myx, the FF, Conan, Thor, Aquaman,Lizard, Green Goblin, Falcon, Supergirl and midway through the year Isis are cut from the WGSH team.

1980 Trimming down. Riddler, Batgirl and Catwoman are yanked from assortments.

In July 2009, Mattel toys announced they would be relaunching 8" DC comics action figures under the World's Greatest Superheroes banner in conjunction with EMCE toys. The new figures have been revised but retain a mego like feel, See the EMCE Toys section of the Museum for more details