New-to-me: a database of the religions of comic book characters. Note that characters are not always heroes/villains, etc. There are over 36,000 characters in the database. You can browse by hero team, religion, character name, character type, and so on. I was amused to see there are a couple of Unitarian heroes (though one of them was apparently created by the UUA itself.) I did see at least one character who was listed but religion was noted as undetermined.