Haven't read the whole thread so I don't know if this has been reported yet or not:
SDCC '10 | Peter David writing episodes of Young Justice cartoon
Posted on July 25, 2010 - 10:06 AM by Kevin Melrose
Peter David has announced he's writing several episodes of Young Justice, the much-anticipated Cartoon Network series based on the DC Comics title he worked on for nearly five years.
"I’m thrilled to have the opportunity to reconnect with the characters," he wrote this morning on his blog, "even if there are some differences between the guys I wrote and the new incarnation. I would love to tell you all about my first episode, but I’m afraid that it’s … oh, what’s the word … Secret.
Fans of the DC Comics series, published from 1998 to 2003, will undoubtedly recognize the not-so-subtle allusion to Secret (aka Greta Hayes), the incorporeal "mist girl" introduced in the 1998 "fifth-week" one-shot Young Justice: The Secret. She, Wonder Girl and Arrowette joined the original Young Justice line-up of Robin, Superboy and Impulse.
We know from the sneak peek that the animated series will focus on a six-person team of Robin, Superboy, Kid Flash, Miss Martian, Artemis and Aqualad. However, in the words of producer Greg Weisman, that is “really just the tip of the iceberg.” The cartoon will feature a 16-member Justice League that mentors the teens plus, judging from the character sheets, appearances by characters like Speedy/Red Arrow and Mary Marvel.