Super heroic rpg

This is a rough basic idea for a super heroic rpg-system.

Many times it seems like superheroes and villains posses some kind of overarching power-level. This power-level is some kind of energy/stamina/strength reserve that is used in conflicts and the like.

Would this be possible to use in an rpg?

My initial idea is to give all characters a power-level, and then let them channel that power through differen means, like super strength, speed, energy control and the like.

.. to be continued.