I felt like this would work well because it would remind you of book 1 and prime you for book 2. Other than a handful of people have read book 1, this trailer wouldn't be very significant for those who haven't read it. But those who have seen the little clip and read book 1 found it to be very exciting.
I think I will try to create something like this for book one and get it uploaded to generate hype and interest before it gets published. As far as the one I have now for Guardian. Don't expect to see it any time soon until it's time to launch.