Young Justice was a cartoon network show that first aired as a one hour movie in November of 2010. Based off the trailers, the show seemed interesting enough for me to tune in and watch it. I cannot express how grateful I am that I did, because it was not since Batman: The animated series that I had seen such superb writing for comic book characters. The show took place in a different universe than the comic book one (Earth-16 to be exact) but yet the characters still remained true to their comic book counterparts. The writers were able to create new stories that were inspired by comic book story-lines but still felt original to fans of comic books and casual superhero fans. Unfortunately, due to the comic book series based off the show and the toys not selling as much as the networks would have liked, the show was canceled after it's sophomore season.
But Young Justice fans are loyal (& stubborn) so they have hope that the show could still return despite having been canceled.