After two of my favourite teaser trailers being Remember me- where the actor uses his voice from the film as a narrative for the trailer and 500 days of summer- where instead of inter titles a male voice is spoken over the top to create the narrative, I looked into voice overs to see if they worked with horror/thriller genres.
Short sentences seem to be used continuously moving the narrative swiftly on. In 500 days of summer it doesn't give to much away but creates a narrative which really suits the independent quirky love film.
Why I feel a voice over is good to use, is that is captures the audiences attention where you can but pictures/shots to words to create a overall image and idea of what the film is about. However, in watching thriller trailers, this is never present it is diagetic sounds from the scenes used as sound effects to enhance the genre. I think using effects on the inter titles will help reiterate the intended genre without taking focus away from what they are watching. This is where music is very important in supporting the inter-titles and helping it all flow together.