I'll start with the first one that comes to my mind.
CONCEPT:
idea of group of warriors. they are a chosen, elect group. given special high priority assignments. they battle evil armies that are created or formed by evil entities to destroy mankind or maybe just important, powerful groups/peoples. they have to find methods to defeat the powerful evil armies. they have to learn new fighting styles of their enemies or find out how to develop the same powers that the armies have somehow gained. example: undead army. can't die unless head cut off. they have to become immortal. by aquiring this power they fall under the jurisdiction of a powerful angel type figure. this figure lays out the rules of immortality and consequences of the misuse of their power. this army can fight in different time periods. possible variation could be the theme of two bodies given the same powers but use them for different purposes. they both think the other is evil. possibly two stories told through different perspectives. maybe the armies have to join forces to defeat real evil.
