Having looked at the vidcaps now as Squid suggested ... agree with her points and not my first spec.

The video promos and the teasers usually tell the same story in different ways. The video caps give us more specific information than the teasers about WHO is in focus.

Abi, Lisa, Skupin -- Lisa and Skupin now get that they chose to ally with people who can beat them in the finals. They want to win.

Malcolm is safe this time, so a F3 plan from this group would be Denise, then Malcolm at F4.

There are no signs of Denise and Malcolm trying to scoop up Abi.

The previews make it clear that Lisa, Abi, Skupin will ally, but will they be the same three that are on the boat trip?

It has to be a challenge that one of those three can win, in which case it is perfectly logical that they could go on reward and cement what they have discussed in camp. Especially if Abi wins. I am not so sure that Skupin would have the nerve to take Abi. Lisa might, but Skupin doesn't like to declare his flips so blatantly.

In the vid preview, Malcolm notes that Lisa wants to go to the end with someone she can beat. He learned that from TC. There's really nothing in his comments that couldn't be from early in the episode.

Most likely, the first half of this episode is a set-up for a plan that will be foiled when neither of these original Tandang three win immunity.

If Malcolm wins, he can give Denise the necklace at TC. So there is a 40% chance of sheer odds that these two can be safe, and even better odds given their abilities.

Other reward combo scenarios:
Say Malcolm or Denise wins. Whoever wins takes Michael and Lisa again to keep them happy campers, or leaves one of them in camp. It's possible that any three who ended up on a boat together would form a pact, just as any two left behind will scheme together (unless it's Denise and Abi.)

But most likely it is the alliance shown forming in the video preview.
Once again, Skupin and Lisa will be foiled by immunity, and their goat bites the dust.

Then, at F4, it is up to them to work Denise so as to keep Malcolm out of the finals, barring immunity, as he has the game almost in his hands at that point.