Thread:LucidPigeons/@comment-366087-20160206040819/@comment-26205772-20160208080736

I... hm. Well, if it's not part of the primary Arrowverse, I wouldn't list the category on the Supergirl villains already on this wiki. I would, however, list it on any villain that appears within the crossover episode(s) and them alone; that seems to be the general thing to do for crossovers.