I think the "6" are just a cover
Either they're the only ones that survived, and everyone else died, or they are covering up and leaving them on the island due to its power, or it can be the people who are now on the island are holding them (I know it sounds retarded but...this is Lost we are talking about, 5896790 scenarios Go!)
I dont know why I get the feeling when Kate says I have to get back to him (in the season 3 finale), most are thinking its Sawyer, to me it looks like she may have Claire's baby (I highly doubt it would look good if they killed a baby on the show)
Jack, Kate, Huggo are the "6" we already know, Im thinking Sayid, and Sun, Jin are the other 3
Sun will die if she gives birth on the island, and Jin is her man, so... and Sayid maybe, because he is 1 determined Mofo
The guy in the casket maybe be Micheal
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