Concept 81 #1

Stare Wars III where Anikin Skywalker was left to die but was actually the beginning of Darth Vadar. Men In Black II when the Laura was the light the whole time and she had been building a relationship with Agent J (Will Smith). Deep Blue when the female doctor used herself as a distraction and actually ended up getting herself killed, and then the protagonist character almost died while the shark tried to escape.