This movie is slow with poor development of characters with no continuity. It relates nothing to the DC universe of characters and is not in keeping with the comic book history of villains and heroes. To suggest that the Joker is the son of Thomas Wayne, there by making him Bruce Wayne's step brother is totally ridiculous.
Maybe some of these people making these movies need to spend more time reading and learning the history before attempting to make a movie.
This movie marginal at best.