I eat 230 grams of protein daily, 308 grams of carbohydrates, maybe 70 grams of fat. I can have one cheat meal a week but it can't be that I eat until I'm stuffed; I eat until I'm satisfied.
All of the great leaders have had one characteristic in common: it was the willingness to confront unequivocally the major anxiety of their people in their time. This, and not much else, is the essence of leadership.
So I'm not really quite sure what Landis' plans were to make another one. The American Werewolf in Paris was a completely separate story.