Director Rian Johnson was still a relatively unknown in Hollywood when he wanted to make Looper, and as such, he had to make a “proof-of-concept” trailer to show that it could be as cool in practice as it was in his own head.
Such trailers are made using a few original clips, but mainly other movies that are similar visually and in tone. Here, Johnson drew on films like Se7en and Blade Runner to illustrate what he was going for, in addition to crudely animating a few sequences himself.
It’s a pretty cool cut, and really makes me want to try the same thing for my sci-fi books. I’ll mash-up some District 9, The Road and Mass Effect cutscenes, and I’ll be on my way!