One of the more confusing sequences in Zack Snyder's Batman v Superman: Dawn of Justice is the "Knightmare Sequence". It's unclear what exactly is happening: is it a premonition? An alternate future? Can Bruce Wayne (Ben Affleck) see the future in his dreams? And then why did Flash (Ezra Miller) suddenly appear with a warning but was also "too soon"? What exactly is going on? Here's the video in case you need a brief refresher, although it leaves out the Flash part. Since we all have an inordinate amount of free time right now, Snyder did a …