Cutiebunny
Frosty Fashionista
You are aware that novels and real-life events have been adapted into film for practically as long as cinema has existed, right?
But the difference is that it sounds that the movie is being adapted from something that is already easily viewable. Generally speaking, most adults do not read books, and would prefer to pay money to see a live-action, special effect feature(even if it is loosely related to the actual book/event) rather than read about and use their imagination.