Conway was a frequent collaborator with Roy Thomas. Together they wrote a two-part Superman – Captain Marvel team-up in "DC Comics Presents" #33–34 (May–June 1981); the "Atari Force" and "Swordquest" mini-comics packaged with Atari 2600 video games; and three Justice League of America-Justice Society of America crossovers. Conway contributed ideas to the funny animal comic "Captain Carrot and His Amazing Zoo Crew!", created by Thomas and Scott Shaw. Thomas and Conway were to be the co-writers of the "JLA/Avengers" intercompany crossover, but editorial disputes between DC and Marvel caused the project's cancellation. Conway was one of the contributors to the "DC Challenge" limited series in 1986.