User blog comment:MakeShift/The Crisis and its impact on the Arrowverse Wiki/@comment-4786757-20200125000024/@comment-2054358-20200126060936

My issue with the Birds of Prey merge is that it's just a cameo that's a lot smaller than Smallville's Clark Kent, Brandon Routh's Superman, and Lucifer Morningstar. Actually Brandon Routh's Superman is more than a cameo because he was the Paragon of Truth before Lex Luthor stole his role. And these three characters actually interacted with Arrowverse characters in the crossover while Helena didn't. The Waverider just detected Earth-203's disappearance. Just because a wiki's easy to merge doesn't mean it should. While I get that the inconsistencies with Smallville, Superman Returns, and Tim Burton's Batman would make the canonicity of Crisis questionable to those universes, Lucifer is not being merged despite him being the one leading Constantine, Sara, Diggle and Mia to Purgatory because apparently his series is too popular. While you may want to merge everything in the Arrowverse, complications around merging the Crisis stuff would make Birds of Prey look like a bad exception.