is the alt timeline the happy ever after?
My jaw dropped when sun and Jin died. I would have put money on them making it to the end.
So with so many of our beloved characters still alive in the alt timeline, is it going to be the timeline that survives? When all is done and Jack and Desmond defeat MIB is everyone (and the island) going to be destroyed? but live on in the alt world.
I personally think that whatever happens will land the island at the bottom of the ocean.