After tonight's show, it looks like Ben and the others are trying to repopulate Atlantis.
1. Naomi says she was given coordinates in the middle of the "ocean", when the clouds cleared...she could see land.
2. We've already seen the 4-toed statue.
3. This would explain why Ben keeps talking about women not conceiving on the island (because all of the pregnant women would have come from some place else) - but Ben wants to establish a native born population (heavily influenced by the magical properties of "the island" (possibly Atlantis) to protect from some yet unseen outside force.
Just my two cents.
P.S. I think this also explains the real Henry Gale (the black man found in the grave which Ben claimed). Looks like Henry Gale stumbled upon the island and probably tried to help some people off so Naomi better watch her back!