Black Lightning will reportedly show up for the Arrowverse's "Crisis On Infinite Earths"

Photo: The CW
Although it shares a network, an executive producer, and a comic book universe of origin with The CW’s Arrowverse of superhero shows, Salim Akil’s Black Lightning has always kept itself separate from its more generally-goofy cousins like The Flash or Legends Of Tomorrow. Although the Cress Williams-starring series—about a retired superhero who gets back into the game when gang violence hits a no-longer-ignorable crisis point—has made a few joking references to heroes like Vixen or Supergirl over its two seasons on the air, it’s also established that it takes place on a wholly different Earth from the ones that Barry Allen and Oliver Queen are always running around, firing medieval weapons on.