As soon as the news of the Cabot voyages reached the King of Portugal he arranged to send an expedition of discovery to the far north-west, perhaps to find a northern sea route to Eastern Asia.
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.
But the Jews will also be believers, so you can say that all the saints, both gentiles and Jews, will go into the millennial kingdom and populate the earth.