Nirvana still kicks ass.
Also, use the tragedy for motivation. The shooter pretended to be the Joker, not Batman. When I saw the movie a second time, it was even more meaningful because it was like Batman was fighting for all of us,not just Nolan's Gotham. I know what you mean though, it can be very difficult to think about Aurora, but it's important to remember them and by not seeing the film, it's a bit like letting the bad guys win.