Hello everyone. Just a couple of things to think about. I believe that what we saw in the last episode of 5th season is the natural course of history. What I mean: if Juliette detonated the bomb and because of that the passengers never came to the island, then the whole show makes no sense whatsoever. The fact that the plane crashed and Desmound spent 3 years on the island means that the hatch has been built. If the hatch has been built, it means that there was an incident. If there was an incident, then the incident was what we saw in the season finale. There is no way that the incident has been something else (simply because Dr. Chen wouldn't have known about it and hence wouldn't have made his family leave the island). Follow my thought? If he made them leave, then he knew that sth was going to happen. If he knew, then someone told him, someone from the future - his son. Exactly the same thing that we saw. So,! whatever happened - happened. I think that when she detonated the bomb she triggered another flash,not entirely new sequence of events. Meaning that "they are coming" to the present days when Ben killed Jacob (and also meaning that Juliette is indeed dying). Or, alternatively, they can be sent long way back in time where they meet Jacob, he reveals to them what happened in the future (here I am blindly guessing) and then they go back in time to wage a war against Locke, Ben and whoever else is left. All comments are welcome and sorry if someone has posted the same thing here.
