What Is Crossover?

A crossover is a storyline that brings together characters, teams, or settings from previously separate comic book titles into one shared narrative. The characters keep their own books, but the story pulls them into a single plot.

It helps readers and collectors make sense of why a story suddenly jumps between titles. Crossovers range from a two-issue pairing to a line-wide event, and the reading order often matters as much as the story itself.

How Crossovers Work on the Page

A crossover between two titles usually asks readers to follow both series. A line-wide event goes further, adding tie-in issues that show side characters reacting to the main plot. Those tie-ins can be optional or essential, and telling them apart is the practical skill.

For collectors, crossovers create a paper trail. The main series carries the spine of the story, while tie-ins and one-shots fill in context. A complete run means tracking every part, which is why reading orders get passed around. Whether a crossover is worth following depends on how tightly the tie-ins connect to the core plot. Some read fine on their own; others leave gaps without the companion issues.