Jenny Agutter — English Actress born on December 20, 1952,

Jennifer Ann "Jenny" Agutter OBE is an English film and television actress. She began her career as a child actress in the mid-1960s, appearing in television and film adaptations of The Railway Children and the film Walkabout, before taking adult roles and moving to Hollywood... (wikipedia)

I have grown up but that should be a positive thing. When you look at a photo album it's lovely to remember being so young but it's also good to know you grew up!
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.
I have a huge respect for writers and realise that this is not an area that I find easy. I doubt that I would have the patience in front of a blank sheet of paper to become a writer.
Clearly any film company that makes a film is always going to talk about sequels particularly if they see something as being successful, which Werewolf was.
To make films is as boring as watching paint dry - you usually have to do little tiny bits here and there. You go off waiting for lighting, you come back - the energy dies. You hope you can find someone who can keep it going.