I think he also made a mistake in watering things down (which happens when you try to make something ridiculous realistic) like the Scarecrow/Johnthan Crane. He actually didn't even want a costume for him.
That's a misconception. Nolan always wanted a costume for Crane, he just wanted a
reason for Crane to have the costume, and therefore asked screenwriter David Goyer, "Why does he need the mask?" Hence the explanation behind the mask within the story (and the character's richer for it).
And as a longtime Batman fan, I thought Scarecrow was done 100% right. Nothing about him was really "watered-down," since the essence of the character was entirely intact. And I'd even argue his minimalistic costume is far more effective than his garb in the comics.
It's like the difference between CASINO ROYALE and YOU ONLY LIVE TWICE. Both of 'em are ridiculous, absurd fantasies, but you buy into one a little easier. And one would hardly suggest that just because CASINO ROYALE is fantasy, it's therefore fine to just go and give Craig's Bond an invisible car in QUANTUM OF SOLACE, right?
I think James Bond is ridiculous in the sense, and I am talking about the books mind you, that it takes things that are plausiable but are just silly.
That's just side-stepping the comparison, though. After all, we're dealing specifically with the realm of cinema.
The reviews of THE DARK KNIGHT beg to differ.
I'll watch the film but that isn't possible for comic book movies.
Anything can be invested with thematic complexity given the right creator, regardless of genre. The widely acclaimed WATCHMEN, a pretty straight-up superhero comic, is among the greatest works of art of the twentieth century. You want to tell me superheroes can't deal with rich, powerful thematic content?
THE DARK KNIGHT won't be "high art" (whatever that means). But I don't see why it can't deal with some rich thematic content in the process of providing entertainment. With ease, it could be as thematically rich as films like David Fincher's SEVEN - a film I believe you enjoy.