Yes. No help at all from some lunatic killing 12 people. It was never going to beat Avengers gross but no one thought TDKR would have opened to 160M OW.No one.
I think it is fair to say TDKR lost 15-20M OW because of the shooting. Once that got hit, the movie did not match anyones high expectations. The Box Office has been hit and it will take months before we get back to normal.
I think this proves that the box office has not been the same since the Aurora incident. There is no way anyone saw this opening below the 1st Expendables.