He acquired the rights in perpetuity for The Talisman back in 1982, before the book was even published.
Efforts to produce a Talisman movie over the decades since didn’t result in a film; it turns out that TV will be the medium.
If The Talisman isn’t a Stephen King book that pops to mind like IT, The Shining, Carrie, or others, that may be because it hasn’t been adapted for the large or small screen at this point, and this particular adaptation has been a long time coming for Steven Spielberg.