Finally, Universal has sealed a deal to not only make a major motion picture but also a television series of Stephen King’s The Dark Tower with Ron Howard attached to director the film and TV series! A film trilogy is more likely with the television series starting where the trilogy will leave off, there's is after all 8 books in all, with The Wind Through the Keyhole TBA.
Of course this leads to other possibilities for its theme parks, its no doubt King’s The Dark Tower is the answer to JRR Tolkien’s Middle Earth trilogy for Universal Studios!
Ron Howard To Direct Stephen King’s ‘Dark Tower’ Film Trilogy And TV Series MTV Movies Blog
Universal Lands Stephen King’s ‘The Dark Tower’ And Plans Unprecedented Feature/Network TV Adaptation – Deadline.com