In the commercial they show Ana Lucia in the "hole", and Michael, Sawyer and Jin(?) being thrown into it as well. I get the feeling Michael calling out "YOU HAVE MY SON" is just random, since Jin came running out to the beach yelling "Others, others, others...". I don't know who the barbaric people are, but I get the feeling they aren't the Others, but maybe passengers from the tail section that have gotten "sick".
Hopefully we will find something out when the computer monitor is accidentally shot. In the previews after last week's show, it showed Desmond running outside with a backpack, so he obviously gets out of the hatch, and it also shows Hurley in the hatch. I wonder if he convinces Locke or Hurley to start entering the numbers, and then takes off, but...how'd Desmond get out of the hatch???