All I really remember about the jj1 plot now is that devan shell some kind of terroist leader (he's called a terrorist in one of the episode text screens).

If you want to make a plot where he "wins" then I think you should have it so he controls carrotus and the goal is to retake it from him. Maybe you can travel to different parts of the planet and kill the boss or whatever to "free" that region. Because as everyone knows, the best way to solve problems is by killing the badguys. You could also involve other planets in a story like this but it's probably easier to just stick to one... large projects fail easily.