Zack Snyder said in an interview, Nolan protected his vision exactly what he wanted during they were making Man of Steel. Original video link: https://www.youtube.com/watch?v=P5pJh6mgbBI  

Zack Snyder Talking about How Nolans brought him on board to make Man of Steel. Original video link: https://www.youtube.com/watch?v=D_ExvZJTDUs