I think that, on the one hand, our audience, our culture is so savvy now to an assumption that teaser effects are not fully representative of the final product. But in the same breath, I would say there's no shot in the teaser that I'm not really happy with.

One that we can admire aesthetically and participate viscerally in. So the goal here, and we've had some early, small screenings, what seems to be kind of happening is that you come in thinking you're going to see a cool robot boxing movie, you don't expect this emotional underdog, father/son movie. And it's not one that's soft and overly sentimental, but hopefully it's one that's poignant.

I think that, on the one hand, our audience, our culture is so savvy now to an assumption that teaser effects are not fully representative of the final product. But in the same breath, I would say there's no shot in the teaser that I'm not really happy with.

If you go to any fight, whether MMA or boxing, there's a whole musical soundscape to these events. There's pre-event pump up/psych-up music, there's fighter introductions, there's between rounds, so my musical needs are really diverse.

I would say, while I think audiences are savvy enough, I think that the effects work in the teaser is quite a bit more than presentable. I think they look good and representative of the film. The harder thing with the teaser, interestingly enough is, how much to show.

There is a reality to the way the actors play the scenes, given that there is a real, animatronic, moving robot in the room. So the level of nuance and realism in performance was higher because we built the real ones, and it keeps the visual effects guys honest.

As opposed to a movie [Real Steel] where everything feels fantastical, it was really important to me, and I recognise it's not the first movie with robots in it, but that blend of naturalism in performance, writing and design with the futurism of this sport. That was the idea.