While continuing with the same mix of reprint material, this first volume of Marvel Super-Heroes also began showcasing a try-out feature as each issue's lead. This encompassed solo stories of such supporting characters as Medusa of the Inhumans, as well as the debuts of Captain Marvel (#12),[4] the Phantom Eagle (#16)[5] and the Guardians of the Galaxy (#18).[6] The Spider-Man story drawn by Ross Andru in issue #14 was originally planned as a fill-in issue of The Amazing Spider-Man but was used here when that title's regular artist, John Romita Sr. recovered more quickly than anticipated from a wrist injury.[7] Andru would become the regular artist on The Amazing Spider-Man several years later.[8]