I suspect we'll have a Batman Returns effect in that some parents will take their kids to see it because "it's Batman" and then complain that the film was too dark and (how dare those movie people!!!) not appropriate for little kids. They will also claim that the film was not advertised as such.
I don't think we'll get that backlash again.If we do i'll enjoy "begins" and "The Dark Knight" and skip out on the merchandise heavy/ lighter third installment.
"I'll get drive-through"