Superman succeeded in establishing a vast, detailed world with a rich history that surrounds aliens and metahumans. It even introduced several iconic comic book characters with roots far beyond Superman’s, including the Green Lantern, Hawkgirl, Mr. Terrific, Metamorpho, and the Engineer. This was all done on planet Earth.

James Gunn recently shared why Supergirl didn’t tell the truth about Kal-El’s parents’ message to him in Superman. Released in theaters across the globe on July 11, 2-25, the film featured a cameo appearance from Milly Alcock as Kara,

James Gunn's recent comments about Supergirl's age and her knowledge of Krypton have already created a plot hole for the upcoming Supergirl movie.