I think the Man in Black is the Man in White in the future. There is scenes from the "previews" at the end of the show where it shows that he and Delores are getting close, and in the first episode it talks about the "past" that the "man in black" and Delores had. My friend first told me this theory before the episode this past Sunday, and I didn't really pay it any mind. But while having that thought in my head and watching the previous episode, I think it could really be a possibility. Some reasons, The "man in white" is a new comer and he is learning all the things that the world has to offer. It shows him wanting to do the adventures and storylines rather than just ******* and killing at first. They have the interesting moment when he gets shot and realizes that he can get hurt but not killed, where he seems perplexed but relieved. Then the biggest thing was the fact that we don't know (yet) is if these storylines are all within a certain time frame, or if they are years and years apart. There is no frame of reference, yet, that makes us think that these things arent all happening at the same time as when we started in the first episode. The main thing that makes me think it is not happening at the same time is the final scene with Delores, where she has her "inner monologue" reminding her of the storyline that she was in. Where she sees the "man in black" in the face of the rapist, and where she sees the shot wound in her stomach that isn't there. When she is riding off, it seems that she gets away without getting shot, but then ultimately ends up in the arms of the man in white, shot from that gunshot while she was riding away. Or at least that is what they want you to think. I think that those were 2 completely different times of the same storyline. I think the final scene where she ends up with the gun-shot wound in the stomach with the man in white, was the memory that she had when she was "seeing" the gunshot wound while at the house. The scene where we saw her running away on the horse and doesn't look to get shot, was because she actually didn't. The final scene was from 30 years ago, the first time she ever went through that storyline as a host. Now, I know that those 3 things don't directly point to the "man in white" being the now "man in black" but I think the fact that there is a "split" in the storyline where one thing doesn't seem to happen, then we see something else happen in a different scene, but seems like it is the same scene, shows that there is a time difference in this storyline and there is a reason for it. And I think the only true link of those storylines are those two characters (man in white/man in black).