The other two movies that i am going to use to relate to the Dark Knight its Harry Potter and the deathly hallows and Spider Man 3 they have a link through the relation of identity spider man being that the black stuff that attaches itself to him and changes how he acts and alters his identity the point where his outfit changes and his personality takes a change for the worst, while in Harry Potter his identity is put in disarray when he becomes the number 1 wanted and is seen as the enemy because of the ministry while in the Dark Knight he is put under pressure to reveal his identity.