Remember, science fiction's always been the kind of first level alert to think about things to come. It's easier for an audience to take warnings from sci-fi without feeling that we're preaching to them. Every science fiction movie I have ever seen, any one that's worth its weight in celluloid, warns us about things that ultimately come true.
My dad took me out to see a meteor shower when I was a little kid, and it was scary for me because he woke me up in the middle of the night. My heart was beating; I didn't know what he wanted to do. He wouldn't tell me, and he put me in the car and we went off, and I saw all these people lying on blankets, looking up at the sky.
The only time I have a good hunch the audience is going to be there is when I make the sequel to 'Jurassic Park' or I make another Indiana Jones movie. I know I've got a good shot at getting an audience on opening night. Everything else that is striking out into new territory is a crap shoot.