Could the new batman movie, The Dark Knight, be cursed?

It's a big success, but is it a curse or a coincidence. First, there was the death of Heath Ledger to an ACCIDENTAL overdose, then Christain Bale is having a legal problem with his family, and now Morgan Freeman is injured from a car crash. It's almost like a modern day Macbeth (which was a popular play in its day but was deemed cursed.) What do you think? Curse or Coincidence?