I'm surprised no one has yet mentioned Watchmen. Now there was one helluva serious movie. I think it's one of the most fascinating superhero movies made yet, particularly so because the plot and dialogue adhered so closely to the original comic book, and most of the changes that were made were excellent changes, making the movie even better than the book(s) it was based on.
YMMV about the changes obviously.
"You Make Me Vomit" ......??
That's a pretty crude response.
Your Mileage May Vary, actually.
I for one disagree about those changes being all that good, but then, I didn't care much for Watchmen in its original source either.