Todorov Narrative Theory...

The narrative for a film that Todorov suggests is a five part structure:
 

1. a state of equilibrium at the outset;

This is the point in the film where everything appears normal and calm, this is also usually the point where characters and the scene are established.

2. a disruption of the equilibrium by some action;

This is when something of an issue presents itself to the audience but perhaps not the characters.

3. a recognition that there has been a disruption;

This is the climax in the film where the plot begins to thicken and there is a disturbance in the film that needs to be resolved.

4. an attempt to repair the disruption;

This is the part in the film where the hero/heroine tries in their best efforts to resolve the problems and "save the day".

5. a reinstatement of the equilibrium

This is the final part of the film after the issues have been resolved and everything appears to be normal again.

Beacause I am creating a teaser trailer, I will not follow the full structure because this would mean that the ending will be spoiled and nobody would see the film.
Instead I am only going to follow the first three points:

1. a state of equilibrium at the outset;
2. a disruption of the equilibrium by some action;
3. a recognition that there has been a disruption;

This means that I will end the trailer with the audince left in suspension, which will hopefully encourage them to want to see the film.