While the two films should be markedly different - Warner Bros.' film will use "BvS" to introduce members of its Avengers-like team to audiences - both show the government calling for superhero regulation against the Avengers and Superman, respectively.
Both films also have a villain pulling the strings to force the heroes against one another.
The marketing campaigns also make the two films appear strikingly to those who aren't huge comic fans.
Both pit two superheroes against each other and ask fans who will emerge victorious in a giant brawl. One redditor humorously pointed out you could call "Civil War" "Captain America v Iron Man: Dawn of Spider-Man."
This isn't the first time two similar sounding films were set for release around the same time, and it certainly won't be the last.
Often called "twin" films, Forbes contributor Mark Hughes explained in a 2011 Quora post that while sometimes the release of two similar films is just coincidence, it could be to piggyback off a competitor's potentially successful - or already successful - project.
Read the rest of his explanation here, and keep scrolling to see 25 more "twin" films that have come out months apart in theaters over the years.