Ever since Batman Vs. Superman was announced, there's been a theory that the film will feature two villains. With the Man of Steel featuring General Zod and his gang, it would almost seem like a step back if Batman Vs. Superman only featured one villain.
When speculating about two villains, the natural inclination among fans has been to pick one villain from the Superman universe and one villain from the Batman universe. However, we've heard zero rumors in the way of casting news for Batman villains. In fact, every casting rumor we've heard has always focused on Superman villains.
Which is why this tidbit of information that Batman-News.com uncovered on the Batman-On-Film.com Facebook page actually makes a lot of sense. According to a Batman On Film Facebook post, there are going to be two villains in Batman Vs. Superman and they are both Superman rogues.
Of course, one of the villains is almost certainly Lex Luthor, as there were plenty of LexCorp Easter Eggs in the Man of Steel. Director Zack Snyder also dropped a pretty strong hint that Lex Luthor would be part of Batman Vs. Superman during a Man of Steel fan event.