It looks like a film of the Vertigo noir action comic 100 Bullets movie is on the way, via Tom Hardy, after a TV series failed to materialise. It’s an interesting one because the original setup was built for serial storytelling.
The initial premise is this:
A stranger approaches someone who has been wronged badly, with a briefcase containing proof of who is responsible and how to get them, immunity from prosecution, a gun and a hundred bullets. What do they do? What would you do?
Later issues delved into the question of who set this up and why, and I imagine a film might go with that, but that starting point is always thought-provoking.