When I saw how clear the picture was on the Blu-Rays, I decided to investigate the spinning swirl that comes up between scenes to see if there was something there, and here's what I discovered (after doing a bit more sharpening of the pic). The main one (that also includes the zoom in and out of the bat) is a close-up of Robin looking at Batman.
The mystery to me is on the spinning one right before the opening credits. I originally thought it might be a spinning Batmobile wheel or something, but it's actually this.
I was thinking at first it was the Start Button in the Batmobile, but now I'm not so sure. The second word certainly is "Button", but what's the first one?