Superman vs Hal Jordan
The Guardians put these two into a battle of willpower to see who's more worthy of being the protector of Earth. They transfer both of their minds into a virtual world where willpower and determination decide who's more powerful and what they can do. They are both told that the fate of the Earth is at stake, and they need to do whatever is necessary to win and save the Earth. This means completely defeating the other.
Who wins this psychic battle of willpower?