It's a LOST Theory post!

So anyone who could care less, go ahead and ignore this. To anyone that likes Lost, here we go!

In the season 2 finale, Desmond turns the fail safe key inside the hatch and a white light appears.

In the season 5 finale, Juliet smashes the nuke inside the swan and it explodes, with a white light.

I feel like these might be caused from the same thing. If Jack and crew are variables, and they were never supposed to be in 1977, then the bomb would never have gone off, and the incident would have been solved some other way, presumably however it was solved originally. And then when Desmond turns the key in 2004, the bomb is what Dharma used as the fail safe, and that's what goes off. But then our crew did end up in 1977, and they did set off the bomb, so would this prevent Desmond from ever blowing up the hatch in 2004? Would there even be a hatch in 2004? Does Juliet travel back in time like Desmond did when he turned the key? So many questions, but what I'm getting at is after Des did turn the key, everything seemingly stayed the same on the island, no time changes or anything. What if that is very similar to what happens to our losties? Maybe Juliet travels back to be able to make the decision once again to get on the submarine and go to the island? Maybe the rest stay in 1977?

Who knows, I just wanted to put this out there and see what people might think, if anyone even sees this.