Ra’s al Ghul:
The psychopathic killer named Ra’s al Ghul was introduced in Batman #232 and has appeared in other comics since then, from JLA to Birds of Prey. The villain was best known after appearing in Christopher Nolan’s Batman Begins as the antagonist to Batman. The TV series Arrow seems to be following Batman’s path as the Ghul family made their appearance in the third season of Arrow. Talia al-Ghul is set to spear in the new season, but whether Oliver queen will follow Bruce Wayne’s path in the love interest territory is not yet known.