I know some people had theorized that maybe Jack and the Others would all have to come together and become the new Jacob but I think this theory has been officially debunked because when Jacob and MiB's step-mom first took them to the light when they were kids she told them that one of them was going to have to protect it. She put emphasis on one of you, which I think is telling us that maybe the rules state that only one person can be protector at a time. Just a small little thing I noticed. Also, I will be the first to admit that Adam and Eve=Step-mom and MiB came straight out of left field for me. I thought for sure it would just be something lame like Rose and Bernard but I am very glad I was wrong because that now has way more importance than Rose and Bernard ever had.