Jonesy,
I would say that yes, one person from each tribe will have immunity. Which could easily explain why the preview for the next episode show so many names mentioned as the vote.
For instance...we saw a clip of Sugar saying they could blindside Ace. Then we see a clip of Sugar saying that everyone is voting for Crystal. That could easily be that the Ace vote was planned...then he wins individual immunity, so plans had to change.
Should be an interesting episode, though I'm still opposed to stuff like this, because it keeps Fang in the game, numbers-wise, when they have no business being in the game.
If a tribe is self-destructing, I say let them burn.
Jim