They may have changed the opening billboard to show past challenges, but we were able to get screenshots of it before they changed it. So we know that Mara and Betong are still safe this coming Tribal Council. Look here. Maey won immunity, so she is safe as well.
The question is, will they return the favor to Arnold and save him? She knows that Arnold and Mara saved her last Tribal Council. Mara also asked for the Immunity Bracelet back, so it is interesting to see if they will actually return it or not. I think Arnold will be safe. And so with Stef. KC is the one who is going home.