Man of Steel came out in 2013 but Mark Millar has now confirmed that he and Matthew Vaughn have talked about making a Man of Steel 2. According to El Fanboy podcast, Millar said that he and Vaughn are "massive Superman fans." He explained that Vaughn called him to see if he would work with him on the project but that unfortuanly Millar had to turn him down because he is working exclusively for Netflix at the moment.