He took on the new superhero Hancock, an alcoholic that needed a white man to fix him, only to reveal he was in love with his white wife, who he became weak when he got close to her.
nikka what does that have to do with a "gimmick" casting, absolutely nothing which is why Smith took the role and declined others like Captain America and Superman, it was his chance to play a superhero without any baggage, he could do whatever he wanted with the character, it was his version of "Superman", Smith's now known for being "Hancock" an actual character and a cool looking believable funny hero who did whatever the fukk he wanted to instead of being known for as the "Black Superman" a gimmick as opposed to an actual character which would have been the case if he took the role.
. You can look at these two and tell yourself they look alike, but people can tell you that the creators have said that Luthor's appearance was based on Greek actor Telly Savalas and you call bullshyt? 
If not 
. I think a black batman would be interesting due to the fact that it's not "safe". I like boldness in my art, greatness comes from stepping outside the confines of conformity.
batmans a vigilante who creates more problems than he solves.
