I still think the island is a remnant of Atlantis. In most mythos/pseudo-history circles Atlantis is the civilization that spread culture to the Egyptians, southeast asians, mayans, norse, greeks, etc....so if my theory is correct you will see more than just Egyptian type coincedences/hints...IMO.
You should start seeing mayan religiosity such as the island needing a sacrifice in Locke...blah, blah, blah.
I don't think the story revolves around reincarnation, but it may.
I'm also wondering why the exit portal point from the cave is in Tunisia...unless it is some Atlantis/Egyptian link.
I'm still going with Atlantis....
