The CW has confirmed that four of its DC-based shows will take part in a crossover event midway through the 2017-2018 season - but the cable network's newest DC-based show will not be taking part. The 2017-2018 CW Superhero crossover will include Supergirl, The Flash, Arrow, and DC's Legends of Tomorrow. According to the Hollywood trade, last year's crossover earned the network's highest weekly ratings since 2010.
Entertainment Weekly is reporting that CW President Mark Pedowitz has said that Black Lightning will not take part in the crossover, and that the upcoming show is not connected to the DC-CW Arrow-verse.
“We do not aim to do a five-way crossover,” Pedowitz said. “Black Lightning, at this time, is not part of the Arrowverse. It is a separate situation. But there will be a big fourth quarter crossover with all four of the shows that are on in the fall.”
EW attributes part of this reasoning due to the fact that the four 'core' DC-CW shows film in Vancouver, while Black Lightning films in Atlanta. Another factor is that Black Lightning isn't scheduled to debut until the CW's mid-season, while the four 'core' DC-CW shows will all debut in the fall.
When asked about a potential oversaturaton of superhero-based TV shows, Pedowitz said that the CW has the "best" and keeps the number running at any one time down to four.
“We believe we have the best superhero programming around anywhere,” said Pedowitz. “Our belief is that we will never have more than four DC shows [on] at a time, as far as that goes, so we’ll always have a rotation of some sort. This programming will last as long as people want to watch it, as long as we have quality programs, which we have thanks for Greg Berlanti, and soon Greg Berlanti, Salim and Mara Brock Akil. We’re going to have something very unique in Black Lightning. But [superhero programming will] last as long as people want to watch it. It’s lasted my whole lifetime, so it’ll keep going.”