Although intended as a one-off story focusing on Superboy, the Legion proved so popular that it returned for an encore in "Adventure Comics" #267 (December 1959). In this story, Lightning Boy had been renamed Lightning Lad, and their costumes were very close to those they wore throughout the Silver Age of Comic Books. The Legion's popularity grew, and they appeared in further stories in "Adventure Comics", "Action Comics", and other titles edited by Mort Weisinger over the next few years. The ranks of the Legion, only hinted at in those first two stories, was filled with new heroes such as Chameleon Boy, Invisible Kid, Colossal Boy, Star Boy, Brainiac 5, Triplicate Girl, Shrinking Violet, Sun Boy, Bouncing Boy, Phantom Girl, and Ultra Boy. Even the 20th-century cousin to Superman, Supergirl, was recruited as a member.