To think that there are many actors over the years who have turned down movie roles as far as DC and Marvel heroes go as far as having the opportunity to play said heroes well off the top of my head I can think of so many actors such as:
Tom Cruise almost playing Tony Stark/Iron Man
Tom Cruise almost playing Bruce Wayne/Batman in the Nolan trilogy
Jake Gyllenhaal & Joseph Gordon Levitt turning down the role of Peter Parker/Spider Man
Ashton Kutcher almost playing Clark Kent/Kal El/Superman
Nicolas Cage almost playing Clark Kent/Kal El/Superman
Mel Gibson, Kurt Russell, Kevin Costner, Pierce Brosnan and Alec Baldwin almost playing Bruce Wayne/Batman back in the 80s and 90s
Angela Bassett turning down the role of Ororo Munroe/Storm
Tom Cruise almost playing Tony Stark/Iron Man
Tom Cruise almost playing Bruce Wayne/Batman in the Nolan trilogy
Jake Gyllenhaal & Joseph Gordon Levitt turning down the role of Peter Parker/Spider Man
Ashton Kutcher almost playing Clark Kent/Kal El/Superman
Nicolas Cage almost playing Clark Kent/Kal El/Superman
Mel Gibson, Kurt Russell, Kevin Costner, Pierce Brosnan and Alec Baldwin almost playing Bruce Wayne/Batman back in the 80s and 90s
Angela Bassett turning down the role of Ororo Munroe/Storm