Wait, are you saying you haven't watched Young Justice yet? Well, you should fix that by watching now. Since you don't know, YJ is about some of the "sidekicks" of the DC universe, like Robin, Kid Flash, Aqualad, Artemis and Ms. Martian as they learn to work as a team and find their place while working with the head honchos of the Justice League. So many DC heroes show up that this becomes a great way to get introduced to characters.
And for those of you that have watched Young Justice, go watch it again. And then again. And maybe watch it again after that. We need to get the numbers up and keep them up. We can't have this cliffhanger be the last notes of Young Justice!