3. Deathstroke
Deathstroke isn't really a Superman villain, but more of an enemy against the entire Justice League. A mercenary for hire, Deathstroke is one of the most intelligent men on the planet, capable of handling himself in a fight against several JL members, often times all at once. In one memorable scene from Identity Crisis, he held his own for a long time against Green Arrow, Hawkman, Green Lantern, The Flash and several others. He is a deadly adversary. Deathstroke wouldn't really be a villain for Superman to fight, but rather for Batman. My thinking is they'll need at least one villain to be a physical match for Batman, and though someone like Lex Luthor would fit that bill as well, Luthor is Superman's arch nemesis and deserves to fight the Man of Steel one-on-one. Deathstroke would be a villain Batman could face alone without the suspension of disbelief as to how Batman could defeat a superpowered being like Parasite or Metallo. Anyone who has also watched the
first teaser trailer for Arkham Origins will also really want to see a fight like that on the big screen.