Robert Downey Jr ... Superman's Enemy?

Robert John Downey has accepted to play the role of "Lex Luthor" in superman's third part. MSG Company announced signing with Junior who will play a master role in the movie after the success he made with his famous movie "Iron Man". However the Company won't depend on the actor "Henry Cavill" playing the role of" Clark Kent" and will probably sign with another actor.MSG in cooperation with Warner Brothers Company announced displaying the new part on 14th of July 2013. This part is written by JJ Abrams while the director wasn't determined yet.