As fr a Solo, DC would need ome talented guy looking for an underused character, just like DC did with Moore and Swamp Thing or the Charlton charaters / Watchmen, Gaiman and Sandman, Morrison and Anmal Man of Doom Patrol. Only Ralph has greater potential, as the point where the superhero and the core of the detective genre meet (and remember how successful is that last genre on film, prose fiction, and specially TV). The Elongated Man is inspired by Nick Charles, a deconstruction of the genre by Hammett, but is heavily influenced by his opposite, Sherlock Holmes. Place that in a convertible with a witty wife in a supernatural world full of obscure corners and forgotten characters and you got yourself a classic Vertigo hit.