Batman v Superman: Dawn of Justice is the first Batman movie to extensively incorporate elements from the wider DC universe, as well as the first live-action feature film to unite Batman, Superman, and Wonder Woman on the big screen. While the movie has met a divisive response from fans, it's undeniable that director Zack Snyder looked to the source material for much of his inspiration.
The single biggest comic book influence is undoubtedly Frank Miller’s The Dark Knight Returns (1986), a book which has been cited numerous times by the cast and crew as having shaped the film’s overall conception:
"The comic book [The Dark Knight Returns] will influence the history of Batman vs. Superman, on which the writer David S. Goyer and myself will work."
Zack Snyder, quote during an interview with French magazine Popcorn in 2013.
In addition to Miller’s work, the film also draws influences from the Superman and Justice League comics, as well as Jack Kirby’s Fourth World. We’re going to try and list as many of these influences here as we can find.