I was scouring through the trailer and I found some frames of interest. I don't know what they mean, but they could be clues or something.
I also spotted a painting that looks like it could be the Queen Zenobia from the first Revelations. It was also sitting next to a herb looking plant. Some other things, like the guy hunched over behind the child in the itchy tasty frame, which looks like something out of the ring. The drawing in the upper left corner that looks like a zombie. Then near the end of the live action stuff you see a guy in tactical gear on a walkie talkie, clearly not a zombie.