 He became editor of the "Justice League of America" title with issue #245 (December 1985) and oversaw the title's revamp into "Justice League International" in 1987 by Keith Giffen, J. M. DeMatteis, and Kevin Maguire.Helfer edited "The Man of Steel" limited series by John Byrne and the subsequent relaunch of the Superman titles.As a writer, Helfer collaborated with artist José Luis García-López on a "Deadman" limited series in 1986 and with artist Bill Sienkiewicz on an ongoing series for "The Shadow" in the following year.