A world where Superman and Batman had sons. Superman was very disappointed with his son's lackluster achievements to point he exposed his son to Gold Kryptonite. Realizing his mistake Superman transferred his powers to his son leaving himself powerless.
- Originally published as an Imaginary Story. Later identified as an alternate universe in Crisis on Infinite Earths: The Compendium.
- Characters from Earth-391
- Other things related to Earth-391
- Earth-391's Comic Appearances
- Reality Gallery: Earth-391
Links and References