On sale date from the 1978 Library of Congress copyright records (cocatalog.loc.gov). Same date given in Comic Reader #152, DC Coming Attractions #14, and in house ads in Black Lightning #8 and World's Finest Comics #250.
Black Canary [Dinah Drake Lance]; Green Arrow [Oliver Queen]; Lieutenant Richard Drake; Larry Lance; Johnny Thunder; Thunderbolt; Justice Society of America [Hawkman [Carter Hall]; Dr. Midnite [Charles McNider]; Atom [Al Pratt]; Green Lantern [Alan Scott]; Wonder Woman [Diana Prince]; Flash [Jay Garrick]] (flashback); Justice League of America [Superman [Clark Kent; Kal-El]; Wonder Woman [Diana Prince]; Batman [Bruce Wayne]; Flash [Barry Allen]; Green Lantern [Hal Jordan]] (flashback)