Changed version of Trailer

My first idea of how i was going to shoot my trailer was i was going to show the murderer following the first young lady and killing her. Then following a second women and killer her. When he follows the next, he ends up meeting her and falling in love but with still having urges of killing her. However i came to the conclusion this is more like a film opening or a short story not a trailer so i decided to change things around a bit.
The way i decided to shoot my film trailer instead was to show the murderer meeting the women he falls in love with her and to show the audience them getting to know each other. This gives the impression from the beginning it's more of a romantic movie not a gory one, which will shock the audience more when the violence does happens. In between showing the man fall in love with the women i am going to show the man killing a number of other women as well. This will confuse the audience and leave them with lots of questions, wondering whats going on, which will leave them wanting to watch the film.
However with doing the trailer this way i had problems with coming up with ideas on how to end the trailer. Therefore i decided that in the gory shots i wouldn't show the man who was doing the murders. So instead the audience watching would be thinking "whys it showing you gory clips in a romantic?" then i could end the trailer by showing the mans face, to show that its the same man that's seems to caring and falling in love, who is also a women hater and a murderer.

For this trailer to be affective and shocking, I'm going to make the gory clips flash up really fast as not to give to much off.

While researching other film trailer that do this i found this French movie trailer i really liked:



I like the trailer for this film because i like how it changes from one shot to the next. It makes the audience uneasy, and causes a lot of tension. Therefore i would like to use this effect in my movie on the violent parts to unsettle the audience.