Ha, if I like a story enough I'll be hungry for more content related to it in whatever form You don't wanna know how many times I've read fancomics that are basically just an adaptation of the original story with the fan's headcanons to fill the gaps Even if it's literally a 1-to-1 adaptation with zero added information ... well that's not possible; pictures are 'added information', so what the heck, I'd still be down for such an adaptation of (web)novels I liked XD
And as HGohwell mentioned, it could bring your story to a larger audience of people who wouldn't have been interested in your novel :]