After leaving Marvel's editorship, he again wrote exclusively for DC for the next decade writing both major and lesser titles – from those featuring Superman, Wonder Woman, and the Legion of Super-Heroes to such books as "Weird Western Tales", "Atari Force" and "Sun Devils". He had an eight-year run on "Justice League of America", writing most issues from #151–255 (Feb. 1978 – Oct. 1986) including the double-sized anniversary issue #200 (March 1982). Conway wrote two additional Superman projects in the oversized tabloid format, "Superman vs. Wonder Woman", drawn by José Luis García-López, and "Superman vs. Shazam", drawn by Rich Buckler.