Len Wein co-created Swamp Thing early in a writing career that has included work on every major hero and villain at both DC Comics and Marvel Comics.

As a writer, Wein is also credited with co-creating Wolverine for Marvel and Lucius Fox for DC. Wein was one of the editors on Watchmen, and has also been Editor-in-Chief at both Marvel Comics and Disney Comics before settling in to a successful career writing comic books and animation. He died in 2017 at the age of 69.

Gerry Conway began his professional comic book career in 1969, when DC Comics published his first work in its anthology The House of Secrets. He went on to co-create the characters Firestorm, the Nuclear Man, Vixen and Killer Croc for DC. Conway also worked for Marvel Comics, where he notably wrote "The Night Gwen Stacy Died" in The Amazing Spider-Man #121, as well as serving briefly as that company's editor-in-chief. His numerous writing credits include the first DC/Marvel crossover, Superman vs. Spider-Man.

In addition to comics, Conway has published the science fiction novels The Midnight Dancers and Mindship. He has also written for and/or produced such TV series as Hercules- The Legendary Journeys, Baywatch Nights, Silk Stalkings, Law & Order, Law & Order- Criminal Intent, The Huntress and Batman- The Animated Series.