First of all, I absolutely loved the promo!! It was really nice to finally some new stuff.
So....about the promo, it appears that the island traveled back in time.
I remember that Darlton said something about: 'we're kinda stepping away from the flashforwards and flashbacks and embracing a whole different thing'
It could mean that they are gonna explain a lot of things through the whole history off the island, it's certainly gonna be exciting I think.

I also noticed that Charlotte had the same problem as Desmond and George, what's up with that? Did she try to leave the island or something?
By the way, I totally loved badass Hurley, it was kind of a shock to see him with a gun :)
I can't wait 'till the next season!

Yeah, Hurley with a gun was pretty awesome :)
And I never thought of Charlotte trying to leave the Island... can she time travel? Where would she time travel to? Does she have a constant?

It appears that the past is leaking into the furture in a way, on the island that is.

The past leaking into the future? As in, like, yesterday is tomorrow? Does this mean people are coming back?

i am so confused about this thing , just can't figure it out !

One thing, has anyone noticed that the castaways were on the island for 108!!! days. This is the same number as the amount of minutes that the button had to be pressed. Surely this isn't coincidence that some get rescued and the island gets moved after 108 days. Just a thought!!!!

Yeah, I noticed that, too. Very cool!

does any1 no if desmond is in the next series

Desmond is in season 5, not as often as in season 4, but he is (thank God!) in it.