Walt Disney's Comics and Stories #511

This issue continues the numbering sequence of the original All-Star Comics, ignoring the 1951 title change to All-Star Western. First appearance of Power Girl. She is introduced as Superman's cousin and has been operating in secret for quite some time. Power Girl is an analog to the Earth-One super-hero Supergirl. It is revealed in a footnote that Power Girl has been operating in secret for several years, considerably longer than Supergirl did on Earth-One. Her full origin was revealed two years later in Showcase #97. Power Girl coins the name "Super Squad" in this issue. The Super Squad is not so much a separate team from the JSA, but rather it represents the newest members to the roster beginning with Power Girl and including Robin and the Star-Spangled Kid in subsequent issues. The Star-Spangled Kid arrived in the present day after a time-traveling excursion as revealed in Justice League of America #102. https://dc.wikia.com/wiki/All-Star_Comics_Vol_1_58
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