The Oscar-winning director of Apollo 13 and The Da Vinci Code is working on a run of movies and television series based on Stephen King's epic series of novels.
"I really can't stop thinking about it," Howard told The Washington Post. "We've been meeting and talking, and I've been reading and researching and just kind of living with it.
"I've been constantly going through stuff... and we've been sending e-mails back and forth: 'What about this approach? What do you think of this idea?'
"We're finding the shape of it. We're moving quickly now - as quickly as we can - and I feel challenged in the most exciting ways."
The adaptation is yet to receive the greenlight, but detailed plans have continued to emerge over the year.
The series has been the subject of various spinoff and adaptation miniseries by Marvel Comics in recent years.