Continuity mistake: Superman gets his hair messed up during his fight with Batman, but while he is fighting Doomsday his hair is perfectly combed again.

Batman v Superman: Dawn of Justice (2016)
Trailers
Directed by: Zack Snyder
Starring: Ben Affleck, Jeremy Irons, Diane Lane, Amy Adams, Jesse Eisenberg, Jeffrey Dean Morgan, Henry Cavill, Gal Gadot, Lauren Cohan





Chosen answer: The beginning is Bruce Wayne's perspective of the events that occurred in the movie "Man of Steel" when Superman and General Zod are fighting (if you haven't seen it, it would explain a lot of BvS events). It's General Zod's ship and the phantom drive. It cuts to 18 months later. Supermen is called to testify in front of a congressional hearing because of his vigilantism over the past 18 months and people are concerned about his actions (like the events in Africa) since he's an all-powerful alien with no way for the people to stop him, so they're very nervous. Bruce seems to blame Superman more than anyone though for the destruction and death of people he knew (and tried to save) because if Superman wasn't on Earth, Zod wouldn't have come to Earth, etc.
Bishop73