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The director, Chris Nolan told the LA Times that the foundation of the film is the transformation and tale of Eckhart’s character (Harvey Dent) from a crusading Gotham City prosecutor to being called Harvey Two-Face who is a maniac that has a face ravaged on one side through a horrible injury.

Eckhart also said that the difference between Two-Face and Batman is how they make their point and how far they are willing to go. Batman has a strong sense of justice that is what he is all about. And Harvey Dent also has an extremely strong sense of justice he’s horribly injured, his fiance is killed, but he’s true to himself.