Wild Theory About the Finale

Okay here's a wild theory about the finale. I've only seem some of the spoiler/foilers but supposedly the finale will contain a flash forward to Jack off of the Island, suicidal and eventually he says to kate "We have to go back to the Island." Well I was thinking about what we see from the promos could Jack be betraying the camp? He and Juliet are leading the group inot the jungle, away from their only guns and their warriors. We see from the promos that they meet up with ben. Well I don't think he's betraying them to Ben. But what if he's betraying them to Juliet? We know that Juliet wanted to kill Ben before. supposedly this was so she could get off of the Island. But what if she just wants to eliminate Ben and take over herself? I had a thought that maybe Juliet is a Dharma plant, sent in to retake the Island. Or maybe she's just ambitious. Keep in mind that all of the Losties actions are based off of Juliets info: the ambush, the looking glass etc. Juliet has set things up. Sayid and co will whittle down the Others best fighters. Meanwhile she'll take out Ben. She'll use the survivors to get in good with the Others. Why would Jack betray them? To get off the Island. Juliet has promised him that she'll let him off the Island. And she does. She lets him, and Kate, leave the Island (maybe the looking glass can reestablish contact. Someone needed to dive down there because the submarine is gone.) Anyway Jack and Kate leave the Island but Jack is torn up with guilt about what he did to the other survivors and decides that they "have to go back to the Island." Time travel hijinks ensue.

Additionally People have been wondering how Penny appears in a Jack flashback. If this is like I said above then Penny might have the means to get Jack and Kate, back to the Island.