King always said he'd never let DT be made into a series or movie!
He was working with folks to make it a comic book, but he didn't want to destroy anyone's view of the characters by making it into a movie or series.
I always loved him for it.
When my sister bought the first DT pocket book, there was a drawing in it of Roland, and he looked exactly like a friend of ours, like they took a picture of him and made it into a drawing.
Since than, I've always pictured Roland to look like him, but when I bought the last book, it had a picture of Roland on it, and he looked completely different, short hair in stead of long, he didn't resemble the friend anymore.
Kinda shattered my image of Roland, and a film would kill it.
Plus, all the fantasy stuff could work, but as the past teaches us (It anyone?) Kings work doesn't adapt well to film.
With the exception of the Green Mile, Stand By Me and the Shawshank Redemption, but those last two didn't need much work fantasy wise.