I suggest implementing a category system where people can make bad guys designed for different levels of play.
Level 1 - Personal Bad Guy - For use in a solo story.
Level 2 - Plot Bad Guys - An enemy that exists for use in a single plot.
Level 3 - Faction Bad Guys - An enemy of a single faction.
Level 4 - Global Bad Guys - An enemy that is the enemy of multiple factions and is part of a global war plot.
By creating multiple bad guys, groups, and factions that affect different levels of the setting, we can keep a pool of bad guys for different levels that GMs and FMs can call on as needed. Workgroups could be set up to work on the metamaterial/wiki articles for bad guy groups so there is always a spread of choices.
A System for the Big Bad
So the setting will obviously always have different enemies on different levels, so this is kind of like a category system for handling bad guys in roleplay.Level 1 - Personal Bad Guy - For use in a solo story.
Level 2 - Plot Bad Guys - An enemy that exists for use in a single plot.
Level 3 - Faction Bad Guys - An enemy of a single faction.
Level 4 - Global Bad Guys - An enemy that is the enemy of multiple factions and is part of a global war plot.
By creating multiple bad guys, groups, and factions that affect different levels of the setting, we can keep a pool of bad guys for different levels that GMs and FMs can call on as needed. Workgroups could be set up to work on the metamaterial/wiki articles for bad guy groups so there is always a spread of choices.