This is an expansion of something I mention briefly in a previous theory titled "The Light = The Force" (Which you should all go read and comment on/rate!).
In this past theory I state:
"The main storyline of Star Wars is for the Chosen One to bring balance to the Force. The main storyline of Lost is for the chosen Candidate to bring balance to the Light.
In Star Wars, this someone is Anakin. Anakin follows a very familiar "Jesus" path (though the story goes back far beyond Jesus, back to even the Egyptian sun god Ra...Egyptians...interesting.) He is the savior who must sacrifice himself to bring balance to the Force (Jesus, according to the stories, brings balance to our spiritual life and abilities to enter heaven.) Anakin does indeed end up sacrificing himself to bring balance to the Force by killing the Emperor at the end of RotJ.
In Lost, the Chosen One is Jack. Jack follows the Anakin/Jesus storyline very strictly. Jack's purpose in Lost is to sacrifice himself to bring balance/peace to the Light. To rid it of darkness as Anakin rid the Force of any remaining evil Dark Siders. MiB is on the dark side. (Side Note: Want a description of what the infection was? Simple. The infected were brought to the Dark Side. Sawyer and Hurley give all the proof we need when Sawyer says Sayid has gone to the Dark Side. Hurley responds that you can always be brought back from the Dark Side. That was the answer to the infection. These people were brought to the Dark Side by the manipulation of MiB. As Anakin was brought to the Dark Side by the manipulation of Palpatine. Both Anakin and Sayid/Claire were brought back to the Light, as Hurley says, in the end.) Jack's purpose is to rid the Island/World of MiB, the person on the dark side. After he does this he must restore the Light to the Island/World (as Anakin restores the Light Side of the Force's control over the Dark Side) Jack restores the light by sacrificing himself as Anakin and Jesus both do. Jack was even stabbed by MiB before dying in the same spot Jesus was speared before dying. Very literal.
This all leads to another theory of mine. Jesus sacrificed himself, died, and rose from the dead in Spirit form.
Anakin sacrificed himself, died, and rose from the dead in Spirit/Ghost Force form (as we see in finale scene of RotJ.)
Jack sacrificed himself, died, and did he rise from the dead in Spirit/Smoke Monster Form? I think that we have strong evidence that this is the case given the similarities in the story arcs and the fact that Jack awoke in the SAME position MiB did on that rock after being spit out of the Light..."
Expanding on this, many people believe that Mother was both the protector AND the smoke monster due to the following details:
1. She killed the whole group of humans and destroyed their village.
2. She carried MiB out of the well after knocking him out.
3. She probably appeared as Claudia to BiB given the fact that she thanked him after MiB kills her. This was her plan all along.
4. MOST IMPORTANTLY: She KNOWS what happens when you enter the Light as she tells Jacob it is a fate worse than death and then we see what happens when MiB enters...he turns into the smoke monster.
Therefore, entering the light DEFINITELY turns you into the smoke monster (with the exception of Desmond who has the special ability to resist this energy).
Desmond is the ONLY person who can resist this. Jack cannot. Many people theorize that maybe the reason MiB turned into the smoke monster was that he was dead when he entered the light. This, however, is not true. Jacob CANNOT kill MiB. It is one of the rules set up by Mother. Therefore, he could not have died when Jacob threw him into the rocky stream and could not have been dead entering the Light.
I truly believe, however, that the strongest evidence is the parallel between the Jack/Jesus/Anakin storyline. It would only be logical that Jack too rises from the dead in a spirit form. (The fact that he was stabbed in the same spot as Jesus by MiB is particularly telling. It is perhaps the writers way of hinting that Jack parallels Jesus in even the smallest of details...and rising from the dead ain't a small detail).
I guess the only way we'll ever really know is if in the 20 extra minutes we get a legit answer...though having seen the rest of the show...I doubt that will happen.
So....what do you guys think?