...but half way through that, with 80 Page Giant #8 (March, 1965), under a cover by Murphy Anderson, readers were treated (by popular demand, yet again!) to More Secret Origins (following up from the 1961 Secret Origins reprint book), with stories on the Justice League of America, the Atom, Aquaman, Robin, Flash and Superman!
Justice League of AmericaFlash, Martian Manhunter, Aquaman, Green Lantern and Wonder Woman each fighting a menace spawned from a meteor from Appellax), uniting at the site of a sixth meteor....and the team watching the team of Superman and Batman beat the seventh meteor! Flash suggested they become a League, and later, the team added honorary member, Snapper Carr (in the JLA's first appearance in Brave and the Bold #28), as well as Green Arrow (joined in Justice League of America #4).....who had this tale told to them! Of course, the Justice League would add more members...
Superman and Batman in #15...
Secret Origins stand alone reprint book, which this 80 Page Giant was reprinted along with, in DC Universe: Secret Origins in 2012, as well as having its own reprint with the More Secret Origins Replica Edition of 1999.