I'm feeling lazy...but not too lazy to post something. This is actually part of a reply on Josh's blog about what's going to happen on Lost. So, without further ado, my guess about how Lost will end:
The whole cast is put on trial for breaking a Good Samaritan law, Jack doesn’t marry Winnie Cooper, they all reminisce about how they all met and leave one by one until only John and the Smoke Monster remain. John holds back a tear as he says they’ll probably never see each other again and Smoke Monster says not to worry about that and that he left a note for John – “Goodbye” spelled out in rocks. John leaves and Smoke Monster looks around the now-empty island, smiles and turns out the lights…and maybe an asteroid is in there somewhere too…and we learn that Kate married Pacie instead of Dawson when we see them watching the end of “Lost” and she wonders if they should call to congratulate Dawson.
So, there you have it. Now you have no need to watch Lost anymore. You're welcome.