Oh I just remembered about Rose and Bernard. Interesting coincidence that Bernard built a rustic cabin in the middle of nowhere just like Horace did for Jacob's Cabin but they definitely looked different. I think this scene made it much more likely that they are Adam and Eve, living out in the jungle by themselves for three years. Not mention the Dog of Doom is with them, signaling their immanent deaths. The only question is where do they get the black and white stones?