It looks like the tribes will compete against each other involving past booted members. And it will mostly depend on these booted members to help them out win (or lose) the game.
My other speculation, since Burton is carrying a flag is that there will be a 3rd tribe sans Trisha (since i don't see her there although it will be unfair to her to be not included in this 3rd tribe). The merge will not happen just yet.
Another one would be one of the remaining members will be given a chance to quit and Osten will take it while the members of the 3rd tribe will compete to take his place and so Lil will win it.