User blog comment:TimeShade/The Crisis Has Arrived/@comment-2054358-20191206062225/@comment-26537965-20191206230103

Constantine was on the same Earth though, so adding it was probably the right call. Now on Supergirl, back in the day I was kind of opposed to that, but did not care enough to actually vote, though by now it has pretty much become an official part of the Arrowverse since it is in every crossover event. Now on 90s Flash, it was already hinted that it is in the Arrowverse due tomaking a cameo in Welcome to Earth-2. My personal opinion on the possible Black Lighting merge is that we do not need to do it unless it b ecomes an annual thing like Supergirl.