[Flying Spaghetti Monster]

Circus Peanut wrote:

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The filmmaker rarely has much control over how his movie is promoted by the studio, including the cut of the trailer.

True.
Clearly the hook of the movie though is not a a sappy drama of violence and family (these are themes that came when the idea was expanded on).. clearly what helped him fill up that blank page was the idea of the Looper and the time travel..