I've come up with 2 more heavy metal concept album ideas.

UNTITLED AS OF YET

The album centers one two different countries (not yet named) who worship the same diety, called the All Mother. One country relies solely on their faith for their needs and wants, while the other country prays for the strength they need to make their prayers a reality and offer the All Mother sacrifices to show their appreciation. Eventually, the All Mother shows more favor to this country and the other country is left without her to care for them. In desperation and jealousy, they try to invade their neighbors, but miserably fail and are nearly wiped out. The album ends with this country's people cold and starving and the All Mother appears. It ends on a cliffhanger.

LEPER MESSIAH

This album deals with a group that worships a god who seems on the level, but turns out to be a diseased and corrupt demon.