Keanu Reeves’ character, the ex-assassin, is set to take on some of his most challenging stunts yet in the upcoming film John Wick: Chapter 4. The film promises to deliver an epic showdown between Reeves’ character and Hong Kong action hero Donnie Yen, making it difficult to imagine how the franchise could ever top this level of excitement. Both Reeves and director Chad Stahelski have hinted at the possibility of a fifth installment in the series.