"Batman v. Superman: Dawn of Justice" not only featured the titular characters going at it but also introduced a classic DC Comics villain to the big screen. Despite only being the second film in the franchise, Superman (Henry Cavill) battled Doomsday, the monstrous alien life form destined to kill the Man of Steel. Zack Snyder may have pulled the trigger too soon by including the antagonist, but his appearance had been on the filmmaker's mind for quite some time. Long before his theatrical,...