The WB is slowly turning into the Superhero Network. The Frog net — home of Smallville and (as of Oct. 5) Tarzan — is developing an hourlong drama for fall 2004 centered around fast-moving DC Comics icon the Flash, Variety reports. CBS attempted its own Flash series back in 1990, but that show tanked — and it was really good, too. Not to be a pessimist or anything.