This photo of Aussie superstar Heath Ledger all dressed up in makeup started circulating the Internet yesterday. It makes us feel funny . . . and also terrified. Ledger’s playing The Joker in The Dark Knight, the sequel to Christopher Nolan’s wildly successful reinvention of the Batman franchise. Though the film won’t open until July 18th of next year, the viral marketing campaign has already begun. We’re beginning to suspect that Warner Bros. might be angling for a piece of 2008’s other big marketing op — the presidential election. If that campaign’s anything like this one, hell yes we’ll blog about it.