TDK had quite the subversive script, especially for a superhero blockbuster. It's not very often in these types of films that the love interest dies and the protagonist basically fails at everything he set out to do. It's rightly considered to be one of the most serious and mature of its ilk, and that is anything but common among comic book flicks.
Agree and disagree. Love interests tend to die a lot in super-hero stories/films.
TDK is neither the first, nor the last. I think the greatest (and overlooked) gem in the film is the role of Harvey Dent, with him we see a tragic fall, a true lapse in morality and it effecting everything our protagonist set out to do. For Batman, the idea that his very existence attracts/creates the villains is nothing new (
Batman in 1989 was all about this, as was a scene deleted in
Batman Forever) but the way they delivered it in
The Dark Knight is as original as it can be. Batman struggles with his own morality against unmasking or 'making the choice no one else will make'. Alfred's line reminded me (as I'm sure it did others) of
Spider-Man, only while that film completely nullified the choice, with
TDK we see the hero stepping up to make it happen. Yes, it is unique in its own regard, it is about a hero failing and falling, only to learn to pick himself up, and it will always be an inspiring story, on par with
Watchmen in its meditations on heroism.