Batadon said:
You could always go the route where the villain is trying to save HIS world, it just might come at the cost of yours. Both hero and villain have the same goal, and some of your heroes could be sympathetic or just go totally righteous indignation on him. Do your heroes protect their world and doom his, or do they let him have what he needs to save his people? On the off chance it doesn't destroy your world, it could still change it forever...
nice.. that would need a lot more elaboration then that, but that's an interesting idea.
I like good villains. Characters who, in their own story, would be a noble hero.
One such villain, although not a single entity, are the robots from I, Robot (the book moreso then the movie).
The 3 laws of robotics lead to only one outcome, the robots taking away our freedom to protect us from ourselves. The movie showed that the only way it could, but in the book, a robot would be unable to shoot, or otherwise attack a human, even if somehow it thought it was fulfilling the laws.