I'll try to set up a module to test the concept. If you're an evil character, you'll be placed on the monster's team. This means I'll have to create some support infrastructure for evil players, like evil merchants and such. The idea is you'll be able to talk to, hire, and join with the monsters that the Knight Templars are trying to defeat. Imagine a group of evil characters coming to the defense of the Vile King for example.