The Batman v Superman: Dawn of Justice building sets from LEGO are coming with a DC Superheroes Comic Book devoted to the film.
According to Reddit user Ninjaturtlepickle the comic book came with their set and states its possible the comic book might highlight some spoilers from the film:
My BVS lego set came with a lego comic from the movie. I found it interesting to see how much of this is in the film. i know its just a kids comic but still (major spoilers) sorry for qaulity of pics