How it works
Marketing teams choose material that communicates tone and attracts the intended audience. The film may continue changing after trailer delivery, and some shots are created or altered specifically for promotion.
What people often miss
A trailer is an advertisement, not a promise that every image will appear in the released movie. Major story changes can also make early footage obsolete.
Why this question comes up
Fans frequently compare trailers with finished films and notice missing dialogue or different visual effects.
Key points
- Trailers are often assembled while a movie is still being edited, so they can use alternate takes, unfinished effects, or scenes later removed from the final cut.
- Marketing teams choose material that communicates tone and attracts the intended audience. The film may continue changing after trailer delivery, and some shots are created or altered specifically for promotion.
- A trailer is an advertisement, not a promise that every image will appear in the released movie. Major story changes can also make early footage obsolete.
Bottom line
Trailers are often assembled while a movie is still being edited, so they can use alternate takes, unfinished effects, or scenes later removed from the final cut.
Source and verification
This Answer was checked against Motion Picture Association. Follow the source for the full official explanation and any later updates.