User blog comment:Rassilon of Old/Young Justice spoilers at Comic-Con 2012/@comment-174.16.103.155-20120725044640/@comment-4821105-20120725183111

well he/she wrote "that no one from the original team(I'm not counting Zatanna and Rocket)". Plus Nightwing, Miss Martian and Superboy decline the invite of being of member of team.