All you need to do is briefly describe a fight between Bane, Flash and Superman. Who wins and how? Superman because of his powers. What about Batman? Well, since "Batman always wins," he'll be sitting out and refereeing.
What would you do if you were transported to Mars? Join the Martians and kick the invaders off the planet. Would you use your powers to fight in the war? I would use laser beams. Would you use them for personal gain? To protect the weak. Would you do whatever you could to get back to Earth? Id stay on Mars.