Legionnaire Invisible Kid II appears as one of the hopefuls preparing to audition at the Legion tryouts, along with classic members of the Legion of Substitute Heroes: Antenna Lad, Chlorophyll Kid, Color Kid, Double Header, Fire Lad, Infectious Lass, The Mess, Night Girl, Polecat, Polar Boy, Porcupine Pete, and Stone Boy.
When Lightning Lad is invited to join the Light Speed Vanguard, he is given a card with the initials "LSV" imprinted on it. These are also the initials of the Legion of Super-Villains, adversaries of the Legion in the comics, of which Mekt Ranzz, Lightning Lord, is also a member.