How Could You Be Too Busy for ‘Alien 5′?

During an interview with Empire Magazine, Sigourney Weaver talked about the possibilities of an Alien 5 – “Ridley Scott and I have talked a bit about doing one where we go back to the original planet but I don’t think any of us are really thinking about it. We’re all too busy”. She doesn’t know much about the upcoming Alien vs. Predator but said the spin-off was “one of the reasons [she] wanted to die in Alien 3“.

 
Source: Empire Magazines