I must second MilitiaJim: "Pulp" supers are easily modeled using the current magic system.
Honestly, I'd go with a variant of SpyCraft rather than FC, have sorted powers, and allow "power slots" versus theme/level, maybe with Feat trees or interests to enable certain power sets. Ever wonder why some SuperMan comics involve super-breath, and others SuperMan forgets he has those powers? Check and check.
I'm not certain how to work the classes, but I'd include: Agent/Spy, Augment, Brick/Brute, Blaster/Projector, Inventor/Scientist, Mastermind, Soldier/Athlete, plus some sort of "Pointman/Sage" class.
But yes, very doable. Before there was FC, we used Gestalt with one Btb, one SC and one D&D class, and limited magic items to what fit in the gadgetry slots. None of us could have taken out Batman, but as the Charismatic/Advocate/Wizard I was able to stand my own in combat against some pretty hoss monsters. I felt like a superhero, even if I never did get to cast fireball.
As with all superhero games, finding a "proper" balance is essential.