Fans have been wondering since the announcement that Black Lightning was going into production if it would be a part of the popular CW Arrowverse.
Since it was airing on The CW and was another Greg Berlanti production, it seemed like it was an obvious choice to include it with the other shows. Adding to the assumption that it must be connected, is the fact that Black Lighting has referenced characters such as Vixen and Supergirl, both of whom are part of the Arrowverse. Vixen has been seen on both Arrow and DC’s Legends of Tomorrow while Supergirl is in parallel dimension but has appeared in cross-over events to join Arrow and the others in the Arrowverse.
Despite these things, executive producer Salim Akil says:
We are in our own world. We’re not in the Arrowverse. We’re not in the Supergirl universe. We’re in the Black Lightning universe. If there’s ever a crossover, Supergirl will come to Freeland, or Green Arrow will come to Freeland.
So, the official stance is Black Lightning is not part of the Arrowverse. But one could also argue, if Supergirl is considered part of the Arrowverse despite being in a parallel dimension, then wouldn’t Black Lightning? If there is any possibility of a cross-over then that would mean he is in fact part of the Arrowverse.  What do you think?
