So we're screwed. We have no clue who's going this week.I think it might help if we analyze Jon's comment from Episode 3.
Jon says that Sandra is not an "immediate threat" there are "Bigger threats" but she's not "in the Final Four."
So who is JOHN'S Final Four? This might help lead us to the key alliance that will vote out one of the other four.
Based on the episodes and Survivor Insider videos, it's likely that Shawn, Michelle and Burton are aligned, which makes Jon a pretty good lock for the 4th spot.
* Episode 1 SI, Sandra says that Burton takes the fishing net away from her rudely.
* Episode 1, Burton, Shawn and Michelle share coconut juice
* Episode 1 SI, Sandra says she likes Christa and Rupert.
* Episode 2 SI, Sandra and Christa complain about Shawn.
* Episode 2 SI, Burton says Rupert is not really part of the group and does his own thing.
* Episode 2 SI, Jon says Burton likes his singing.
* Episode 2 SI, Sandra refers to Trish and Christa as "buddies." Later she calls Shawn and Burton, "Batman and Robin."
* Episode 2 SI, Jon hints that Christa and Michelle are rivals, but it's hard to understand if he really means that or not.
* Episode 3 SI, Christa wants to go visit the other tribe and get to know them. Strategic? Or is she worried about her place in her tribe?
* Episode 3 SI, Jon and Christa go off looking for treasure together.
* Episode 3 SI, Shawn, Burton and Michelle make nasty comments about the "laziness" of Jon and Christa.
Based on this evidence, my best guess is that Jon's Final Four troop is made up of Jon, Burton, Shawn and Michelle.
1) That means if Rupert is taken away by the Morgan Tribe, the voting block of four has the majority.
2) That leaves Christa, Trish and Sandra as the prime targets.
3) Sandra was deemed "not the biggest threat." One can speculate that Jon meant Rupert was the biggest threat. But if Rupert is gone, does Sandra become a threat again?
So, I believe that the three biggest targets based on editing are Trish, Christa and Sandra.
Who goes? Who knows? But I am leaning toward Christa.
Feel free to poke holes as necessary.