Yeah, I'll drop it, I was just compelled to point out my extreme disagreement with Ultimatehero.
PS: Ulty, I wish you the best in the industry. It's tough out there and I hope you can make it. But come on, if you want to bring your A-game, there are hundreds of other movies that can challenge and inspire you in the writing department. Step it up, man!
Unsure what disagreement since I believe TDK was success for being a great movie, not the tone, and saying the execs vps etc believed it was the tone - NOT that I believed it was the tone. Which for some reason you took it as.
Got the connections. It's set. Let's just say after one brash with "make it TDK level dark!" during a meeting I almost sold out with another property that HAS to be light and the complete opposite of TDK dark. What that made me do was go back to the drawing board, back to how I like telling stories and no longer feel pressured to make what should have been a light tale dark and gritty to appease the guild of elders. Basically how Mark Steven Johnson went from DAREDEVIL: DIRECTOR'S CUT to GHOST RIDER - how Fox handled it, I seriously think sent him for a loop. Hear what they want from you? Hear some of the backward thinking? Yeah, especially starting out - it can get to you.

x men did that over 10 years ago
Actually BATMAN BEGINS started that trend which then really came to light with THE DARK KNIGHT. "We wanted Bond to be more like Batman in Batman Begins, going dark and grittier than before." Come on, I can't be the only guy to remember those kinds of quotes for DOZENS of movies over the years. Plus it didn't seem to create that mandate of "make it TDK level dark!" from the guys at large.
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TDK was a game changers in Hollywood because it focused things on dark and gritty. I should note it was a game changer to fans and general audience members because of it's quality. But to Hollywood - yeah, it was it's tone.
AVENGERS was a game change in Hollywood because it showed very light or very dark can equally be a powerful force both critically and box office wise to have to contend with. Basically it refocused everything on story and character and aesthetics bringing and even more powerful light to TDK making Hollywood realize the true reason of why that film was successful and that it didn't have anything to do with the tone. It evened both out.
If AVENGERS came first we would see a Hollywood that focused on expanding special effects, adding in over the top wars, and making everything lighter to then be balanced by TDK rather than the other way around. One of them - eh, Hollywood's gonna be confused. Two of them equal the other to it's true intent and purposes.