Bloodied but unbowed, Optimus Prime stands over Megatron with his ion blaster leveled at his enemy. For purposes of this discussion, Hot Rod has been tackled and restrained by Kup so he cannot interefere in "Prime's fight". With nothing to distract him except for Megatron's ruse, does Optimus Prime take his chance and put Megatron to death, or does he choose to spare him so Megatron can be captured to face justice? Myself, I don't see Prime executing a beaten Megatron - it would go against everything he stood for. He might have made Megatron sweat (and hopefully kept the blaster on him until help arrived) but I don't believe he would have killed him.