The Justice Society of America recently got a lot bigger thanks to the addition of some forgotten young heroes. Calling themselves the "Young Justice Society," these characters were introduced via DC's miniseries Stargirl: The Lost Children. The previously unseen sidekicks of popular Golden Age heroes, these youngsters have highlighted a way to successfully retcon characters into important periods of time in a shared superhero universe.
Source：https://www.cbr.com/stargirl-lost-children-dc-comics-dodges-spiderman-spiderboy-sidekick-problem/
