The Flash is heading to CBS for a Supergirl crossover
Back when CBS first picked up Supergirl, pretty much everyone but CBS itself assumed that the show would eventually find some way to crossover with The CW’s Arrow and The Flash. All of the shows are executive produced by Greg Berlanti and Andrew Kreisberg, and The CW has already proven that big superhero crossover episodes are like ratings (and fan service) dynamite. CBS was reportedly hesitant to even consider a crossover initially, but a rumor came out back in November that the network was becoming more open to the idea as a possible way to boost Supergirl’s ratings and help guarantee it a second season.