These changes in policy shaped the future of the medium as a whole, and in the short term allowed DC to entice creators away from rival Marvel, and encourage stability on individual titles. In November 1980 DC launched the ongoing series "The New Teen Titans", by writer Marv Wolfman and artist George Pérez, two popular talents with a history of success. Their superhero-team comic, superficially similar to Marvel's ensemble series "X-Men", but rooted in DC history, earned significant sales in part due to the stability of the creative team, who both continued with the title for six full years. In addition, Wolfman and Pérez took advantage of the limited-series option to create a spin-off title, "Tales of the New Teen Titans", to present origin stories of their original characters without having to break the narrative flow of the main series or oblige them to double their work load with another ongoing title.