Compare this cover with the over on Justice League of America (1961 series) # 29.
Dr. Mid-Nite and Starman join the JSA, replacing Green Lantern and Hourman, and Hawkman becomes the JSA Chairman.
First appearance of Dr. Fate's new half-helmet in a JSA story.
The splash page is the same exact piece that appeared in All-Star #7 as the promo for this issue except for Dr. Fate's helmet.
Letterer credit from Craig Delich.
The other JSA members are alluded to.
Credits from Craig Delich.
Oddity: in several panels in the story, artist Hibbard draws a white circle around Starman's yellow chest star.
Hooty is made the official mascot of the JSA.
Storyline continued in Sensation Comics (DC, 1942 series) #1.
The illustration of Wonder Woman on the splash page was used on the cover of Sensation Comics #1.