Lost dealing with Alt-time lines?

A Fascinating Theory about Lost Next Season

http://www.alwayswatching.net/features/lost-theory-season-6

Adam Quigley, of slash film fame, has an interesting theory about what happened after the bomb went off. And, it has been strongly hinted at that there are two timelines (universes) now.

What does Jacob have to do with this? (Make sure to watch the interaction between Jacob and other people in this clip.)

I still want to know about John Locke 2.0. Why is he evil?

Here is another theory about Jacob.

Is Jacob the Smoke Monster?: There is some convincing evidence to prove that. Or is it actually Jacob's enemy that's doing all the Smoke Monster stuff?