Marvel’s Captain America: Civil War will hit theatres in May and it will cause confusion to those who didn’t follow the comics.
Civil War is defined as a war between citizens of the same country. So it will be a war among the mutants (but since Fox owns the rights to X-Men including the word mutant, Marvel won’t be able to call them that)
Above is an animated explanation of Marvel’s Civil War. Please note, this information was all from the comics… but some of it might (and probably will) show up in the new Captain America movie. Spoiler alert.