In terms of box office takings, a trailer can make or break a movie.
On the one hand, it could go viral. It could be like the IT teaser trailer. That one's had almost 31 million YouTube views at the time of writing, and it even set a record for the most online views in a single day.
If the trailer misses the mark, though — if it's a bit drab or, even worse, it gets panned — it could significantly damage the hype around a movie's release.
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