Official announcement from Stephen King: https://twitter.com/StephenKing/status/704674793145159680
Idris Elba and Matthew McConaughey
King says the movie will open with the first line from the first book. “It should start that way,” he says. “I’ve been pretty insistent about that.” He even tweeted it out today.
It’s easy to imagine that phrase being The Dark Tower’s version of “A long time ago, in a galaxy far, far away …,” serving to introduce almost any part of the saga. But this first film will not adapt the plot of the first book, The Gunslinger, published in 1982.
“[The movie] starts in media res, in the middle of the story instead of at the beginning, which may upset some of the fans a little bit, but they’ll get behind it, because it is the story,” King says.
Arcel declined to specify which books his movie focus on, but he did offer this clue: “A lot of it takes place in our day, in the modern world.”