“John Wick: Chapter 4” is on the horizon, with an epic running time of nearly three hours and a cast that includes Scott Adkins and Hiroyuki Sanada. Chad Stahelski is once again back in the director’s chair, while Reeves’ titular assassin prepares to enact his revenge against the High Table.But if you’re looking to refresh yourself on the “John Wick” story before checking out “John Wick 4,” you may be wondering where all the “John Wick” movies are streaming.