User blog comment:Rassilon of Old/Young Justice spoilers at Comic-Con 2012/@comment-5432352-20120822170505/@comment-5432352-20120822221005

Agree with you there; I'm sure the influx or new characters is intentional. According to Greg and Brandon, Rocket's sole purpose in her 2(?) episodes was to have her say, "what's going on" and "is this what they are like."