This rattled me to the core. It was an unflinchingly bleak allegory of the War on Terror. Batman and Gotham's leaders were forced to question how far they would go to fight crime and terrorism, when faced with a villain hellbent on raining down death and chaos. Heath Ledger disturbed me deeply. Brilliantly written, brilliantly acted and directed throughout.
I'm just surprised the studio ever let it through, without at least inserting some lighter elements or a "happier" ending. I suspect this is the depressing Part 2 of a trilogy; the Empire Strikes Back or Two Towers for the Chris Nolan tour-de-force Batman saga. So hopefully there's light at the end of the tunnel. But no light in the movie at all.