You really think Stephen King is going broke? You think one box office dud movie hurts his net worth? Look at the filmography. Lots of movies bases on his works have tanked over the last 40 years. He's still worth $400 million.
Not King. The movie-makers. And no, I don’t think they are going broke because of one stinker. But a whole string of them? Not exactly a career-enhancer.