Here are my crazy Lost theories:
That dude with Jacob from the beginning will be named Esau. Also, they are twins. Also, Esau inhabited Not!Locke's body (and also probs Christian's). He could also be Smokey. Esau = Smokey, Jacob = the island? I need more thoughts on that.
Juliet is not dead because I love her too much and she is way too much of a BAMF to die.
Rose and Bernard are Adam and Eve from S1.
Esau actually being the one in the cabin would explain the "help me" line.
Richard is definitely from the Black Rock.