After leaving Marvel, Shooter took up work in advertising concepts, writing, and illustration for several years, supporting himself through an assortment of menial jobs during periods when advertising work was unavailable. An interview for a "Legion of Super-Heroes" fanzine led to his again applying to both Marvel and DC. Though both companies offered him work, Shooter opted to return to DC because they had offered him more prestigious assignments: "Superman" and a chance to again write Legion of Super-Heroes, now in their own book, "Superboy and the Legion of Super-Heroes". However, his relationships with both Superman editor Julius Schwartz and Legion editor Murray Boltinoff were unpleasant, and Shooter claims that for varying reasons the two editors forced him to do a number of unnecessary rewrites. In December 1975, Marvel editor-in-chief Marv Wolfman called to offer him an editorial position.