UPDATE: Below is the official description. Looks like it will be Superboy not young Superman and Arrowette is now Artemis. Hopefully ate some point Wonder Girl will be allowed to appear.
Young Justice - In Young Justice, being a teenager means proving yourself over and over—to peers, parents, teachers, mentors and, ultimately, to yourself. But what if you’re not just a normal teenager? What if you’re a teenage super hero? Are you ready to join the ranks of the great heroes and prove you’re worthy of the Justice League? That’s exactly what the members of Young Justice — Robin, Aqualad, Kid Flash, Superboy, Miss Martian and Artemis—will find out, whether they have what it takes to be a proven hero. This all-new series is produced by Warner Bros. Animation and based upon characters from DC Comics. Sam Register (Teen Titans, Ben 10, Batman: The Brave and the Bold) is the executive producer. Brandon Vietti (Batman: Under the Red Hood, Superman Doomsday, The Batman) and Greg Weisman (Gargoyles, The Spectacular Spider-Man, W.I.T.C.H.) are the producers.
According to Toonzone, an announcement for the animated Young Justice series is imminent. and we even got a new, non-leaked image. Looks like a pretty good line-up though I am not sold on the look for Martian Girl. I also wonder, given all the legal tanglings with Superboy, if that is actually Superboy as opposed to the Legion of Superheroes solution of just using a young Superman. Can't wait to hear more about this series.