What they share the most is the fact that they are Survivors, although they survived quite different experiences, they both managed to stay alive despite all odds. Juliane Koepcke survived a plane crash and eleven days in the Amazon jungle, Bill Garleb was a prisoner in the Philippines during World War II.
I expected it to end with none of the humans turning out to be ailen after all. I thought that maybe there was aliens, but they were messing with the people of the town to make them push the blame on eachother.