My theory is pretty short. I think that Sun and Ben are not in the 70s with Jack, Kate, Hurley, etc because the island does not want them there. The island has wanted to get rid of Ben for a while as we've seen from him getting cancer. Ben has already been able to manipulate everyone in the year 2004 when the losties first crashed. But the island does not want to give Ben the chance to go back and maniuplate everything as far back as the 1970s allowing him to tell little Ben some information. Maybe this happened before in the time loop and that's why Ben knew so much information in order to be as cunning as he has been, and the island is now trying to prevent that.
As far as Sun not being in the 70s, I think the island was trying to respect Jin's wish for her not to come back. The only reason she was on the plane was because of Ben tricking her and the island did not want that.
Also a thought on why Lapidus did not make it to the past. Obviously the island did want him there because it is not a coincidence that he was the pilot for that flight. I think Ben's comment about a pilot not leaving the passengers was very telling. I think Lapidus had to stay in 2007 to make sure the passengers were safe before going back to the 70s.
.... Yes this is a LONG theory and not just a question Theory by WNGYPSY
As far as Sun not being in the 70s, I think the island was trying to respect Jin's wish for her not to come back. The only reason she was on the plane was because of Ben tricking her and the island did not want that.
Also a thought on why Lapidus did not make it to the past. Obviously the island did want him there because it is not a coincidence that he was the pilot for that flight. I think Ben's comment about a pilot not leaving the passengers was very telling. I think Lapidus had to stay in 2007 to make sure the passengers were safe before going back to the 70s.
.... Yes this is a LONG theory and not just a question Theory by WNGYPSY
