National and All-American shared some ownership and advertised and co-branded their comics as if they were one company.

They also collaborated on All Star Comics, an All-American publication which featured the Justice Society of America, a super hero team including characters from both companies' stables, e.g., The Spectre and Starman from National, The Flash and Green Lantern from All-American.

Like its predecessor All Star Comics, each issue of Leading was taken up with a single adventure of the SSOV broken into multiple chapters, each featuring one or two heroes.

However, the heroes of the SSOV were hardly the company's most popular characters—most of those already being members of the JSA—and the strip lasted through only the first fourteen issues of Leading.

Leading Comics led the charge as the first DC title to drop its superheroes.