Why wasn't Superman in the Big All American comic book? 0

[Bo_Hogg1]

I mean everybody else was in the book.

[Crowzilla]

There's no Batman, Robin, or any of the other characters from the National Allied Publications line.

It was intended to showcase Gaines All American Publications line (hence the title). Two separate publishers that promoted and distributed together thanks to Harry Donenfeld's investment in the company.