Joker is unstoppable in this movie. He takes punches system does everything to get rid off him. But his genius to interpret the situations before and manipulating is awesome. He is a real survivor. His laugh is incredible the way he uses is brilliant. Joker is very clever and a strong and berave character portrayal in this film indeed. He even shows the audience the relationship with Batman. In my view one is one side of a coin and the other is the opposite side of coin. Anyway both of them belongs to the same coin. I think what's new about this film is that Batman our childhood hero is like turned to joker in a way. Joker is trying for justice in this movie. But unlike Batman does he is not comfortable. He has to deal with lots of things. Remember when joker goes to Wayne's house he uses his finger to make him smile but I don't think that was because he wanted to abuse him. I don't think he is even enemy to Wayne. He is just for his sake dealing with things in a very unusual way. I think what he was trying to show us there was the character joker once was a Batman. Given the idea that all characters are fictional. The narrator might be on that purpose. Joker at the end is not bad at all what makes him bad is that his thoughts on himself. At the end what do we know who is good or bad. But at the end it is significantly important that both characters are not totally evil.