11 years ago, Keanu Reeves hadn’t had a hit movie in several years, Chad Stahelski was a stunt performer who had yet to direct a movie, and action cinema was in a bit of a rut. All that changed with the release of a little movie called “John Wick,” one that brought some much-needed spark to its genre. Named after Reeves’ taciturn lead, the original 2014 “John Wick” was on paper a relatively straightforward revenge story, following a legendary hi…