User blog comment:Thailog/Greg Weisman & Brandon Vietti Talk Saturday's Season Premiere/@comment-3094698-20120427163911/@comment-71.231.172.108-20120430121129

I think when it says "some don't make the cut" it means that, when it came down to it, some of the team just wasn't cut out for hero life, or didn't want it. Somehow, I imagine Artimis being one of them, with how painful it probably got with her family life. And if anyone could sink out of being a hero, it would most likely be someone without any superhuman or alien abilities, and Artemis is the only human on the Team who's not accounted for. (I don't personally count Roy; he was never fully integrated into the team, clone or not)

I could also see Aqualad wanting to go back to Atlantis and finish his education at the conservatory at some point.