Why do we love superhero movies? Is it because we enjoy action-packed, fantastical tales of derring-do featuring costumed crusaders fighting for justice? Or is it because we identify with the ideals and complexities of the people behind the masks? Whatever the reason, it's undeniable the heroes that originated on the pages of Marvel Comics have exerted a powerful hold on the popular imagination. Using a weighted formula, we've ranked every theatrically-released Marvel movie, from the beloved (Spider-Man 2) to the forgotten (Ghost Rider: Spirit of Vengence).