Well, now, didn't tptb leave us with a cliff hanger??
I've watched several times, and still have so many questions, it makes the mind spin - for a list of most of my questions, just go to memphish's blog.
When Jacob say's "they're coming" I think he means Jack & Co. Some believe it's Ilana and her group, but Flocke already knows that they are at the foot, so that's why I think so.
Is Juliet dead? I say no, because then so is everyone near her, and that would wipe out 1/2 of the cast. The white light represents a flash in time. What made it flash though? Ben is one of the good guys imho. Just wonder how Des and Penny are going to make it back into the story line.
So, theory away!!