List of Transformers animated series had a show where Zarak replaced Galvatron and did not feature new characters, human Daniel Witwicky played a major role.
Meanwhile, Zarak replaced Galvatron - who had vanished in the explosion - as Decepticon leader, constructing a personal Transtector so that he could battle Fortress's own giant form, Fortress Maximus, and redubbing himself Scorponok. Although populated mainly with new characters, The Headmasters did continue to feature characters from all previous seasons, including new versions of Soundwave and Blaster, rebuilt after a duel that destroyed them both as Soundblaster and Twincast. 
