I think that kid is Aaron who will replace Jacob. I think this was hinted at early on because of the insistence of Claire keeping him with her. I think that somehow he managed to make it to the island and because of his age did some time hopping himself. After all, he looks like he's roughly fifteen and he was born in the first season which makes him about five in linear time.
But I wonder if anybody noticed this, but in the alternate story line when Claire was giving birth to Aaron, I believe the doctor was the one who said his name before anybody else.
And if you noticed, the smoke-Locke somehow managed to take on Locke's mannerisms to the tee. After all, he got really angry when he was told what he couldn't do and yelled "Don't you tell me what I can and can not do" So there is a lot more to that smoke-Locke that needs to be revealed.
But by my way of thinking I am beginning to think that the island is a prison of some sort. I think that the smoke being did some sort of crime and is possibly incapable of understanding what he did so is imprisoned here. However, this remains to be seen.
But I wonder if anybody noticed this, but in the alternate story line when Claire was giving birth to Aaron, I believe the doctor was the one who said his name before anybody else.
And if you noticed, the smoke-Locke somehow managed to take on Locke's mannerisms to the tee. After all, he got really angry when he was told what he couldn't do and yelled "Don't you tell me what I can and can not do" So there is a lot more to that smoke-Locke that needs to be revealed.
But by my way of thinking I am beginning to think that the island is a prison of some sort. I think that the smoke being did some sort of crime and is possibly incapable of understanding what he did so is imprisoned here. However, this remains to be seen.