One of the things that’s important in a long-running RPG is making a memorable plot that attains definitive closure. You don’t want players feeling like they have unfinished business and want to go Do More Things.
So, for instance, say you start dropping hints early on of some sort of epic Magical Badass, like a lich queen or something. Early on, the players don’t find out much; just that there’s someone called Zola who is behind a whole lot of strange shit, and a lot of it is not good. And they are never quite sure what she is. Wizard? Dragon? Lich? But eventually they find out: She has many forms, but her true form is one of the Medusas. Not the modern watered-down species that fall for the mirror crap and you have to meet their gaze, but a true abomination from beyond the veil, whose stare can turn whole armies to stone.
The reason this works as a plot is that the players will never speak to you again once they realize you spent six months building up to the reveal that the big cheese is the legendary gorgon Zola.
you’re grounded.
GOALS