ICv2 has posted some exciting news for DC television fans. Executive Producers Greg Berlanti and Andrew Kreisberg announced that the CW’s Flash will appear in CBS’ Supergirl. The Crossover episode will air March 28. This will bring the DC television universe a fifth tie-in show even though Supergirl is on CBS. It has already been stated that Constantine has been in Arrow even though that show was canceled the character has lived on. The other three (Flash, Arrow, and DC’s Legends of Tomorrow) being on the CW. Don’t know how they would tie in with Gotham unless they bring in a grown up Bruce/Batman and use the same villain actors with some aging makeup on them or have the Legends of Tomorrow team go to that timeline in Gotham. It would be really cool if they could get them all tied together.