I would wager that many of us became fans as kids.
But would we have become fans if the movie was a young adult type ala twilight?
I'd expect (though I don't know) the Aliens audience to have a large amount of teenagers. I saw Aliens when I was 13, which is the lower end for Young Adult. And we are talking Young Adult; not children.
True but the films they are watching is the full on mature ones we have, would the franchise have fans if it was toned down? its like that novelization of Aliens, all the swearing is gone.
Obviously there may be some, since everyone's tastes are different.
I might give this book a chance, since its not fair to judge it without reading it first.