How effective is the combination of your main product and ancillary texts

I believe my ancillary texts and trailer complement each other. In both my ancillary texts (magazine front cover and film poster) I have used shots that would be iconic parts of the film. I used the psychic standing outside the caravan with blood on her hand and her looking out of a smashed window. Both of the ancillary texts feature the psychic character which the trailer shows her as evil and threatning.