Length of Trailer

I have been thinking about tthe length of my movie trailer, the research suggest that an average trailer is somewhere between 1-1:30 minutes and a theatrical trailer is about 1:30-2 minutes. I have decided that my trailer will be around 2 minutes long. It took me a while to come to this decision as i want there to be enough of my trailer to hook people in and them want to watch the movie but dont actually give the story line a way.