A Knight Ridder/Tribune Piece covers how comic-book creators have become more open in exploring religion in the colorful, action-packed world of superheroes. A few writers have brought religion into the mix when taking on some longtime characters. But don't expect most superheroes to suddenly start going to church or synagogue and discussing their religious beliefs. Religious themes are explored freely in the growing subgenre of Christian comics, which are usually the province of small, independent publishers. Larger publishers such as DC and Marvel have a wider readership to worry about.