Given that Jake Gyllenhaal is only 40 years old, this is a part that could potentially remain viable for him to play for the next decade/decade-and-a-half – but, frankly, it may not take that long for an adaptation to get made.
Thinking back just a few years, Stephen King’s The Outsider was published in spring 2018, and the first episode of the HBO series made based on it debuted in January 2020.
We haven’t specifically heard about any plans to make a live-action version of Billy Summers, but it’s not outside the realm of possibility that we could hear about a studio picking up the rights as early as tomorrow.