Superboy became Superboy starring the Legion of Super-Heroes with issue #197 (August 1973). Crafted by Bates and Cockrum, the feature proved popular and saw such events as the wedding of Bouncing Boy and Duo Damsel in Superboy #200 (Feb 1974). Cockrum was replaced on art by Mike Grell as of issue #203 (August 1974) which featured the death of Invisible Kid. With #231 (September 1977), the book’s title officially changed to Superboy and the Legion of Super-Heroes and also became a “giant-size” title. At this point, the book was written by longtime fan Paul Levitz and drawn by James Sherman, although Gerry Conway frequently wrote as well. Saturn Girl and Lightning Lad were married in All-New Collectors’ Edition #C-55 (1978), a treasury-sized special written by Levitz and drawn by Grell. In #241–245 (July–December 1978) Levitz and Sherman (and then Joe Staton) produced what was at that time the most ambitious Legion storyline: “Earthwar“, a galactic war between the United Planets and the Khunds, with several other villains lurking in the background. During this period, Karate Kid was spun off into his own 20th Century-based self-titled series, which lasted 15 issues. Levitz left the book, to be replaced full-time by Gerry Conway.
Superboy departed from the Legion due to a plot of a villain, and the book was renamed simply Legion of Super-Heroes starting with issue #259 (January 1980). Editor Jack C. Harris hired Steve Ditko as guest artist on several issues, a decision which garnered a mixed reaction from the title’s readership. Jimmy Janes became the regular artist in a lengthy tale by Conway (and later Roy Thomas) involving Ultra Boy’s disappearance during a mission, and his long odyssey to rejoin the team. This story told the tale of the Legionnaire Reflecto (only glimpsed during the “Adult Legion” stories in Adventure Comics), featured villainy by the Time Trapper and Grimbor the Chainsman, and saw Superboy rejoin the team.