Although The Freedom Force aired along with The New Adventures of Batman during the animation block Tarzan and the Super 7, the Filmation series barely qualified as a DC series due to the presence of one team member, Isis. But hey, it's at least a character crossover, right?
The heroine Isis was introduced into DC comics after landing her own live action series The Secrets of Isis matched with Shazam! In addition to DC's Isis, the team consisted of Merlin, Sinbad, Hercules (of Space Sentinels fame), and Super Samurai. Granted the powers of Isis by an ancient amulet, the heroine gathered a team of superheroes for just five 11-minute adventures in 1978.