10. Martian Manhunter
J'onn J'onzz, AKA The Martian Manhunter, may not be the immediate character people have in mind when thinking of a television show, but hear me out. The character has had an ever-changing backstory since his debut in 1955, but certain aspects of the character have survived the test of time. J'onzz is one of the last surviving members of his race, has a wide array of powers, and spends his days as detective John Jones. His powers include shape shifting (which allows him to hide is green-skinned appearance and blend in with humanity), telepathy, x-ray and heat vision, invisibility, super strength, and flight. He also has quite the love of Oreo cookies and his biggest weakness is fire. He became a recurring character in the last few seasons of Smallville, and his own show could be quite successful if done right. He can spend the majority of the show as John Jones, the detective, only revealing his true form when fighting crime as the Martian Manhunter (which would save them a lot of money on green makeup). His backstory could act as an overarching story throughout the first season (much like Oliver Queen's time on the island in Arrow). He also has quite the rogues gallery, which includes his twin brother, Malefic, who is responsible for the death of Mars; and whose sole mission is to finish the job by killing Jones. In the comics, Bruce Wayne referred to the character as "an amalgam of Superman and Batman," which the showrunners could use to their advantage. Possessing many of the same powers as Superman (along with a similar last-of-his-kind backstory) and the detective skills of Batman, the show could be a unique blend of cop drama and superhero fare. His powers are simple enough to accomplish on a television budget, and as a founding member of the Justice League, the door is wide open for crossovers and cameos from other characters in the DCU.