User blog comment:Gifist8/Black Lightning Confirmed For CW!/@comment-30655988-20170330192418

I have an idea for how Black Lightning can crossover in the Arrowverse. I figured since Arrow was the first to crossover with Constantine, and the Flash was the first to team-up with Supergirl, why not have Legends of Tomorrow be the first to encounter Black Lightning. I figured since the plot of Black Lightning was already a hero decades before the series happens, the Legends could travel to when he was a younger crime-fighter. That way, the Legends and Lightning will recognize each other in the present for future crossovers.