You should have a good idea of what will be in your movie and what won't so you can create a movie trailer that conveys the ideas and tone of your film.
This is for the create a visual image standard in English but if you are a good speaker you could replace this activity with a presentation about the behind-the-scenes of your movie.
The essential thing the standard is looking for is how you use images and verbal language to develop an idea. This guy talks a little about that when he discusses theme and tone.
Still don't know where to start then watch this clip.