As the person who is not familiar to the American SuperHero comics( Even with the movies) this comic was quite refreshing that licensed characters' comic could be done well. When Batman mentioned the 'relationship' of him and Jocker at the beginning of the story, it immediately remind me very recent batman lego movie because it made good comedy about their 'relationship'. It quite seemed romantic in the movie because Jocker acts like 'why don't you love me as I love you' but it made me laugh. Jocker and Batman, their relationship is really famous. (think about I don't know any story about Batman, no matter it's comics or movies) They are 'fatal' rival and try so hard to 'reach' to each other although their purposes are different.
I don't know this is based on the original Batman story, the character developments were nice, especially i liked that part that there is reasonable backstory to push the motivation of Joker's behavior. I always wanted to know how Jocker became like that and what is motivation of his feeling against the society. It was nice to see the flashback of Joker rather than Batman. Only Batman I know is Batman of series of Dark Knight(which I didn't even finish watching it), and I feel this comic was quite closed to the movie. This comic showed every details of the story, it almost feel like movie storyboard. I could feel the mood, character's movement and what they are thinking. My favorite part was that at the very end of the comic, Batman showed his thought about Jocker that he cares about him. He might be only one who deeply cares about him by now. It is totally different from people who Jocker used to called friends, and if you think about Jocker and Batman don't know real identity each other I could see why people see them as 'destiny'. They creates their own world, and only they understand each other.
It sounds really odd, but I'd like to see Musical base on Batman story. This version of Batman has really good drama in the story and also the plot seems fit to Musical. The duet of Batman and Jocker would be nice because their emotion toward each other is quite deep. The only thing I worried about is what Batman usually do is 'chasing' and super 'action' movement to beat the bad guys. The small stage of the theater might be the limit of their movement but it also would be depends on how the stage is designed.