Season 3 of Arrow begins Oct. 8 on The CW. For its first two seasons, it has been the network’s most-watched show, averaging 3.8 million viewers in Nielsen’s Live + 7 ratings. On Tuesday night, relying on Arrow’s strength and presumed audience desire, The CW launched a spinoff, The Flash, also based on a DC Comics property. The Flash, starring Grant Gustin as Barry Allen, was born out of an Arrow Season 2 arc; the two shows are set in different cities, but exist in the same universe, and will cross over. The premiere did incredibly well, drawing 4.5 million viewers. Even at this early stage, executives at DC, The CW, and Warner Bros. (the studio that produces the show), are eyeing a third character who could possibly lead another show. “There are discussions going on,” said Mark Pedowitz, the president of The CW, in a recent telephone interview, “but I can’t tell you what they are.”
I am thinking with Arrow being their Batman and Flash being their Superman they'll need a Wonder Woman....I am thinking Zatana...female and she will be going after magic threats which will keep her away from Arrow's gritty crime and Flash's super humans.