Countdown to the Incident.

What's going on in Lost?
Well, there are two time periods having their story's told concurrently; 1977 and 2007.
In 2007, Locke was leading Sun and the Others in a Mad Quest to kill Jacob, Claire was still M.I.A., Christian hadn't creeped anybody out for a few episodes and oh yeah, the Shadow-statue people, Iliana and Bram and so forth, had enacted their own coup, conked Lapidus on the head, and were marching off to an undisclosed location with a very awkward looking metal box.
Also, gone bot not forgotten, Desmond was recovering in a hospital somewhere and Charles Widmore was scheming.
And back in Dharmaville 1977, things were on a collision course: 'the incident' is coming, and Daniel was determined to prevent it by way of nuclear detonation. Then his mother shot him in the back. Very sad. Jack took up his crusade and enlisted the help Daniel's murderous but repentant mother and the always welcome Richard Alpert to finish the task and wipe out all life on the Island for good. Kate took exception to this and left, Sayid showed up and had no problems with it.
In Dharmaville proper, the jig was up; Sawyer and Juliet were on the sub (cue Kate), and Miles, Jin and Hurley were lurking by the dock spying through binoculars. While their original plan was to head to the Beach for the whole 'starting over' plan, it remains unseen as to whether Hurley will try to force some kind of rescue plan. It's not as farfetched as you might think; he saved Sawyer and Juliet's bacon back in the Season 3 finale.
Now it seems to me that to satisfy a literary completeness, we must see these two disparate groups reunite. They parted ways in last years finale and have been working towards each other (whether they knew it or not) all year. It also seems that Desmond has been so thoroughly under-used this year that he must play a huge part. Because it's not like they've let us forget about Desmond. Every now and again they'll pull him out like a magic trick - now you see him, now you don't- just to remind us that he's still around, and still unpredictable.
In regards to the bomb I am of two minds. I mean, how cool and fucked up and Lost would it be to detonate a hydrogen bomb in the finale? Cool and fucked up, yes, but also rather consequential. That, and, Jack's an idiot. He won me over for awhile there in Namaste and He's Our You, but I just can't support any of this whole 'let's undo the entire show' sort of nonsense. I'm siding with (shudder) Team Kate on this one.
'Don't Nuke our Imaginations, dude!'
Now, I'm afraid that, despite my best intentions, I do not go into this evening totally unspoiled. This is mostly because Dave's a jerk, and I'm weak. So what I know is this: We will see a much older version of a present day character, indicating some kind of time shift to the far future.
What?
So basically, I know that I know nothing. This was just a way to bring my mind up to date and kill a bit of time. 8 hours, 20 minutes now.