I like your moxy and that would be a great twist, but in showdown at cremation creek we see sovereign and killinger in the same room at the same time.

elaborate on the killinger as sovereign thing please.

But we do not know that bird was the sovereign for certain, we are led to believe it is.

Okay so there was no Doc vigilante super villain slayer in the special, and after watching it twice since airing I have put together a theory (assuming the season 6/special teaser is canonical). Well not so much a theory as a blind hunch.