Claire dies. And given Jack’s reaction he may feel he is culpable for her death. The Oceanic Six refers to the American survivors (eight are mentioned) and the other two would be Jin and Sun, who returned to Korea. If Sun remained on the island then the pregnancy would kill her and if she leaves, then Jim would have no reason to remain. I can’t guess who the other two of the Oceanic Six would be, but I don’t think Ben is one of them.
While Jack’s flash-forwards are probably the most into the future of all of the flash-forwards (Jack, Hugo, Sayid and Kate) I can’t guess where in the time line the other’s. I mean, Kate’s comes before Jack’s (an interesting twist – the “he” she wants to return home to is her little boy, not her lover) but we don’t know where it really falls in relation to Hugo’s or Sayid’s.
There is still an appalling lack