I'm fairly new to the blog posting. I've been a fan of lostpedia for years, I've just never made an account so be easy on me if this sounds ridiculous.
That being said, I wonder if it has come to anyone's minds about the correlation between locke and nemesis, being that when Locke arrived to the Island, dead, he was taken over by Nemesis and that when Christian first arrived to the Island, dead, he was seemingly as much alive as Locke was.
My thought is maybe Jacob had something to do with taking over christian's body, effectively putting him one step ahead of Nemesis, in this "loophole" of theirs'.
Although even I have a hard time believing this as it honestly could be anyone, we haven't seen yet, that took over Christian's body.(should this theory be correct)