Interested. My suggestion? Don't worldbuild too much before starting. Concentrate on the story. Invent some really [i]bad-ass[/i] villains for the players to fight. Make some plot points with a beginning, middle and end. As for world-building, really all you might need is some vague answers to inevitable questions that pop up like "Where did the superpower stuff come from?" "Who-or what is at war?" "Why are they at war?" and so on.