As DC fans will no doubt know, the tagline "Unite the Seven" was once used on various marketing material for Justice League a while back, before Warner Bros. changed it to read "Unite the League." This was, of course, because the film only features six heroes - Batman, Superman, Wonder Woman, Aquaman, The Flash and Cyborg. However, that hasn't stopped speculation from running rampant in regards to who that mysterious seventh member could be and whether or not they'd still show up in the pic.