I think this opens a huge can of further questions: what is a Stephen King? Is it a best selling author who's a house name, a very successful genre author, one who spans genres and is successful in all of them, one whose' books get regularly translated to TV, a very good craftman of books that people actually read...
My feeling is that there isn't and _won't be_ a new Stephen King that checks all the boxes, due to declining readership and reduced barriers to independent publishing.