Enough said. No really. The only 2 people who have been seen in there enjoying Jacob's hospitality have been Christian and Claire. Both Shephards. Grandpa practically waved a flare at Jack to give him the shoes he needed. He's connected. Jack? Well we don't yet know how he's connected. Christian did make a special point of asking John to say hello to his son for him. And guess which of the O6 was the only one influenced by John's tilting at windmills? Jack. He and his whiny, monotonous "We have to go back!" kept John's crusade alive. Not certain which of the Shephards will end up being Jacob, but I'm willing to bet it will be one of them.