I have read theories etc. so these are not all mine but thought you might be interested. Copied and pasted some of them along with my own opinions.
The little black kid (walt) was kidnapped by the "others." Sawyer I don't think is dead and neither is the black dad or korean guy. Or maybe 1 of them dies. But this is what I think will happen. One of them will go to part of the island and meet up with the other survivors from the plan crash that we have not seen yet. In last nights episode they showed many characters that prob. will be the othe survivors. Why show them?
As far as the hatch and island. The monster on island is clearly mechanical (as you could hear it). So it must be some security system maybe the government played around with. What are they protecting? Or is this an experiment and Locke did say he felt they were brought to this island.
The fat dude has these numbers that play key role on show. The #'s are supposed to be bad luck but these numbers clearly did not want him on plane. You saw how hard it was for him to make flight? Maybe the island didn't want him. Did you notice the numbers appeared throughout episode especially in the fat dudes flashback.
room 2342
floor 23
amount of km on the car when it broke down .
42 KM 23 celcius and they show 16 and 15 KPH speed then show 4 and 8 KPH .
At the airport On the screen don't know if it as nothing to do (Flith 815 Departure 14:15 sit 20 G Arrive Lost Angeles 10:42 ) Then old men as crazy 8 on his hat then Hugo offer 1600 $ Also on the scooter he past by girls wearing sport Jersey with number 4-8-15-16-23-42 all in order. Also the gate 23 . Those number are fallowing him everywhere . Kate mention 23 000 for the reward. I wonder if the numbers are to all of them or just him . The hatch had numbers This fat guy might have some kind of power. Things shut down or blow up when he is around. Car stopped, alarm clock stopped/blew up, business burnt down, so this might explain the bad luck.
There has been a lot of good on island that survivors have not noticed.
Locke regained the use of his legs. Jack learned that his father didn't hate him. Michael regained his son (and Walt regained his father). Jin gained his freedom from Sun's father (and he and Sun seem to have regained their love for each other). Kate also regained her freedom. Charlie overcame his addiction. Boone and Shannon got closure on their dysfunctional relationship.
BTW, I am sure you missed it. When the monster appeared and it was black smoke, inside the black smoke were 2 faces. You could see that through slow motion.
I think in season 2 we will be introduced to more survivors. I also think these current survivors that we have been introduced too might split apart. Jack said to Kate he needs her on his side because of Locke and how strange he has been acting. Locke said to Jack I am a man of faith and you are a man of science. Maybe people of faith will separate from those who are into science.
So there will be many story plots next season. New survivors (maybe), splitting up of current survivors (maybe), the hatch, the others (who kidnapped the black kid), the monster (who made mechanical noises), danielle (the lady who was on island before), maybe good vs evil with the 2 kids, Claires baby and the black kid. Remember in beginning episodes when the went to cave they found a black and white rock. Black/White Rock. Black kid vs white kid. ???? Good vs evil? The black kid seems to have special powers or something special about him so maybe he is good and claires baby is evil?