There are a couple things you need in an action movie to succeed. A good grasp of the language of how to shoot action sequences is vital, since a cohesive visual style is crucial for the audience to even get anything out of the extended shoot-outs or fistfights. Understanding how to keep bringing new elements to the table in each of your action sequences so they don't get repetitive is a great choice, ditto for getting editors who know how to make all of these scenes flow naturally. John Wick: Chapter 2 understands all these crucial rules as well as one other truism of life: it never hurts to have an adorable pit bull around.
