I love the PA franchise, I really get into it and every night I sit there, holding my breath waiting for something to happen, something worse than the night before. This trailer is fairly epic, it's interesting how they show it from the perspective of the neighbours.
But I agree with Swift, what happens between PA:3 and PA:1/2. It's been a while but if I remember correctly it ends with the cult of old women leading the girls away from their dead parents, with the demon in tow. How do they not remember their grandmother killing their parents and has the demon stayed with the whole time? PA:3 left a lot of plot holes in my opinion.