I dont think its an theory.......I think its more of an reality because thats exactly what Ben did.
What would be really cool is having an episode about his daughter and her upbringing on the island.
Just think, they show them kidnapping her, bringing her up and then basically her meeting Karl, or falling in love and it ends exactly at the time where the present is.
I think that would be an easy way of showing alot of the history of the island and the others.