After the revelation of Gotham's true "mayor." That was about two hours in. I would design the second film to be the capture of the Riddler which could have been fleshed out with about forty more minutes of riddled crimes.
I watched the UHD disc of this tonight. Yep, long (but not dull; it held my interest throughout), but it could have been and probably should have been two movies quite frankly. Really enjoyed Pattinson as the title character, but found his Bruce Wayne rather uninteresting. Had I not known it...