Insiders call it "The Great Disconnect,” that moment at the Oscar show when the winner turns out to be a movie that no one in the TV audience has ever heard of. And this year there's a growing sense that the Great Disconnect will be a retro musical, one that deftly fits that definition. It's called La La Land, a favorite on the festival circuit that will follow in the tradition of Birdman or The Artist or 12 Years A Slave as Hollywood's favorite film from creative outer…
