O roteiro do filme foi uma criação original do escritor / diretor Liam O'Donnell. Ele cita uma série de influências de ficção científica em sua escrita mas não em Keith Laumer
This movie is kind of a love letter to my favorite movies. Die Hard, Terminator 1&2, Predator, Aliens, Independence Day, Starship Troopers, Indiana Jones 1-3, Big Trouble in Little China. Not sure if it's just because you will always love the movies you see when you are ten years old or that the movies I saw when I was ten were the best.
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It's always changing... but the ones I've watched the most are definitely Raiders of the Lost Ark, Conan The Barbarian, Die Hard, Big Trouble in Little China, Predator...
But also Terminator, Star Wars, The Thing, Alien, Aliens, Mad Max, Road Warrior, Fury Road... and so on.
A gênese do Skyline original foi um fim de semana bêbado em um apartamento alto.
So, lesson learned there, we started thinking along the lines of Paranormal Activity - shooting something in Greg's new penthouse condo which overlooked Los Angeles. It seemed like an ideal place to watch the world end, so that really was the genesis of the story. Waking up one morning, seeing something strange outside your window and then everything just unravelling before your eyes.
After we came up with the general concept, the co-writer Joshua Cordes and I wrote separate three-page treatments. We took our favourite bits from each and got to work. Colin and I were both obsessed with Lost at the time, so you can see some of that influence in the flash forward opening and the mystery of the blue lights. But from the very first time we pitched the logline, we all knew it was kind of special. Everyone saw the potential of this low budget setup with huge visuals and it just took off right away.