When that character and the X-Force appeared, they took the comic world by storm. You have to look at those numbers. And you see that that isn't Rob Liefeld's only creation. There's all these other things, like Cable and Domino. There's so many things that actually could be fascinating onscreen and unlike anything you've ever seen before onscreen. So I think Fox is in a really nice position where they've got something that feels as wide and different as the Marvel Universe.

One of the things that made Star Wars work was the kids didn't know who their dad was.

I just noticed I've been writing lots of female-led things. Two of them haven't been announced yet, but the big Greg Capullo book I'm doing is a female-led story, and I'm doing another series with John Romita which is a female-led story as well.

Matthew Vaughn phoned me up and he said, "Hey, listen, the movie has just done gangbusters. We've got to do the second one." And I was like, "Matthew, I have no second book. Dave and I haven't done it," and he's like, "You're kidding!" He said, "This movie's just made $420 million!" I was like, "...We've got nothing." So the amazing thing was, because we own the rights, we still get paid and everything, which is fantastic.

The big thing is it's a domestic drama. Everything else in science fiction tends to be high-concept. Really for the last 40 years or so I think sci-fi's been a little cold and a little inhuman quite often - certainly since the 1980s - and I really wanted to do something that almost felt like a regular, real-life drama but just set it in a sci-fi setting. I think the best stuff is always like that.

Ever since 1980, sci-fi has generally been more Bladerunner than Star Wars. People talk about Star Wars being the most influential movie of all time and creating the blockbuster along with Jaws and that sort of thing, but really there's not been a space opera that anyone can go and see.

I think American audiences are quite interesting in that they can handle almost any amount of violence, but the moment the violence becomes sexual violence it immediately becomes an issue.