Batman Vs. Superman : Dawn of Justice is an Earth based science fiction which was released in 2016 and is directed by Zack Snyder.
There are two great comic companies, Marvel and D.C. Comics. Each have a set of stories where their individual heros join together to defeat an enemy that none can defeat on their own. Marvel calls their the Avengers and D.C. calls theirs the Justice League. Marvel got a head start with their Avengers movies out first, D.C. are playing catch up. D.C's Justice League which includes Bruce Wayne - Batman, Clark Kent, Flash and Hal Jordan a.k.a Green Lantern.
This film goes somewhere towards building up the Justice League with three of their major heros, Superman, Batman and Diana Prince - Wonder Woman eventually all teaming up to defeat a greater enemy. However at the start, the two male character have to sort out their differences after what happened at the end of Man of Steel where Superman took on General Zod.