User blog comment:Justice Avenger/Which young heros you think should be added to The Team?/@comment-5141417-20120617000119/@comment-432124-20120619022613

Actually, they're not just part of Superman's cast. There's also a Legionnaire who is part of the Flash family (XS, Barry's granddaughter and Bart's first cousin). Also, they did have a story in which a team of Legionnaires showed up in the present and teamed up with the Teen Titans.