This project has been cancelled due to work on a new DC Universe shared with the YouTuber Grasso Guy, known for his Flash series.
LEGO Justice Association is a project that Monkeyfilms and some other users are working on. It is a bunch of different series revolving around characters from DC Comics. There are going to be series or movies for each of the main characters in DC Comics. For more info go to the Justice Association Wikia. You can also follow the project on Twitter.