A certain part of the trailer that reveals Carver's identity...
At one point in the trailer, Luke says "What's the most important thing in this world? What's the one thing a man would walk hundreds of miles to get back?".
Carver is the father of Rebecca's baby. That's the only thing... possible. This is such a good story line. It also explains why Carver is after them. For his child.
All I know is, I'm not letting Carver touch Rebecca.