They had some event in LA where they ran next week's episode. Very detailed spoilers are out there now as to what allegedly happens in the next to last episode:
Warning, Spoiler:

- Ben kills Widmore. Locke tells widmore if you tell me why you brought desmond then i wont kill your daughter. ben shots widmore because he said his daughter doesnt get to live.
- Locke kills Zoe. Slices her throat
- Jacob explains why he chose the candidates. and why kate isnt one.
- Jacob becomes visible to the 4 remaining candidates including Kate and explains this to them directly
- Jack becomes Jacob's replacement. Including a ritual where Jack drinks from a stream and Jacob says "now we are the same"
- Sayid didn't kill Desmond. all we see is an empty well with a rope
- Desmond beats up Ben in flash-sideways. Desmond beats up Ben and Ben has a flash of when he got beat in the OTM
- Locke wants Jack to fix his spine in flash-sideways. yes after he realizes this might be fate. and jack says the lines dont mistake coincidence with fate.
- Desmond turns himself in for running over Locke. Then breaks Sayid and
Kate out of jail with the help of Ana Lucia and Hurley.
- Desmond is getting all the Oceanic 815ers to congregate at the concert.
- Richard gets slammed by the smoke
- Ben is following Flocke around after this, seems aligned with him
- Widmore reveals the purpose of Desmond, part of it is whispered to Flocke, the word "failsafe" is used
- Flocke announces his intention to "destroy the island"


Seriously. That spoiler tag really has possible spoilers in it. Don't think I'm joking around, click on it and then whine like a little bitch if you don't want to know what supposedly happens.