I completely agree wrt +100, unfortunately I doubt there's funding for a sort of "dropping you in the middle/aftermath of the story" concept movie.

But in another world that'd probably be the best and only way to truly adapt anything in the Crossed universe. Zombie apocalypse is already well-understood by everyone in the audience, so a 5-10 minute montage showing the event and explaining the rules, then fast forward to the good shit.