Marcos next freelanced for DC Comics, drawing Man-Bat stories in Detective Comics, and working on an issue or two each of series including Freedom Fighters, Kamandi, Kobra, Secret Society of Super-Villains, and Teen Titans before returning to Marvel to do art for issues of The Avengers, The Mighty Thor and other comics.
Marcos subsequently worked as a freelancer for DC Comics, drawing Man-Bat stories in Detective Comics, and contributing to issues of various series including Freedom Fighters, Kamandi, Kobra, Secret Society of Super-Villains, and Teen Titans before returning to Marvel to create art for issues of The Avengers, The Mighty Thor, and other comics.