News of Heath Ledger signing to play the Joker in “Batman Begins” sequel “The Dark Knight” surfaced earlier on. Now, AICN has obtained a picture of a poster supposedly showing Heath from a Joker make-up test. It’s reminiscent of “The Crow”, “Ichi the Killer” and victims of the Carver on “Nip/Tuck”. And probably means he’ll be able to open his mouth pretty wide to do a real Joker smile. Speaking of which, is that Jake Gyllenhaal doing cartwheels?