Joksta
I know what they were trying to do with the show, but it would've been better if they made Young Justice with the Young Justice characters. They said they were putting this in Earth-16 timeline, but they even messed that up, so the show is in its own entity not relating to the comics at all. I understood why Wonder Girl wasn't used (same issues with Teen Titans and they had to sneak her image on the show) and Miss Martian is a logical replacement, I also know that this black Aqualad was created for the show. Kinda defeats the purpose of a black Aqualad when you make him Atlantean with blonde hair, I prefer the comic design much better and my only beef is with the hair. My point is, there could've been some changes to the show to actually relate to the comics better, I think it would've been cooler if this had a more futuristic take with completely new teen heroes. Tim and Bart have made appearances on tv already, so it's not that big of a stretch for them to be used. I don't like the idea of Superboy being introduced with d**k so young, Tim and Conner are best friends.
Okay, first off let's make something clear:
Young Justice the cartoon is
NOT and adaptation of
Young Justice the comic, it's a show about teen heroes.
I'm not sure if Greg has said something about this, but I think they want to start at the beginning; introducing new heroes would need the world to have too much back story; which is not bad, but I don't think that's the purpose.
About the blonde black Aqualad: Actually you've got a point there. It would be cool if Black Aqualad had black hair; but blonde hair and light eyes on a black teenager give him an odd, alien look which I believe it's what they were going for. Kaldur is not a human, he's an Atlantean; they don't follow the rules of humanity (merpeople, octopeople, green people...); besides real black humans can have blonde hair (it's rare, but possible)
About Tim and Conner: Eh........ um....... okay I have no idea, I haven't read the comics, and you might be right; on the other hand no one complained when the DCAU gave Kyle Rayner Hal Jordan's origin (and turned Hal into a cameo), or had John Stewart being the founding GL of the Justice League, or had Wally West being the original Flash with Barry's job, or had Hawkgirl being a founding member of the Justice League. Actually I don't see why is this case different.