Dont let your fear paralyze you. Prepare yourself not only technically, but also emotionally.
If you don't know something, admit it. But, try to impress them with what you do know.
The characters are great, and this is the first adventure of the brothers Grimm, so there's plenty of potential to make a franchise. We've been quite successful in the past, so anything like that, if it does pay off with hopefully the good movie that I think it will be, it pays off also down the road.
People intrinsically know there are secrets being held from us. Look at WikiLeaks: There are secrets that are really true to the world.
