Well, One option that I had always thought of as a way to play heroes, Superheroes in particular in 3.5 is as a cleric.
You play one without a deity, pick your two domains, and then take spontaneous domain casting.
What that does is gives you the ability to cast one of your domains spontaneously and trades in the spontaneous ability to heal/inflict instead.
To me this is almost consistent enough for superhero like powers. Especially how they are all keyed off of one theme.
You don't have to make your character a superhero per say, BUT , how about a cleric of courage and glory? Like he idolized guts and glory so much that he actually awakened a magical connection to those concepts. For him, awakening your "inner hero" takes focus, dedication, and a commitment towards the idea until it can actualize itself.
Back in the day, the character was definitely in tune with his "inner hero", and was the type of man that people build statues for. And then he got married after the adventures were over. He was rich from it, and got a nice house, had a couple kids, and really had fun every day...But he wasn't in the spotlight any more.
So to be true to himself, he has to bring the old armor out of retirement, realize his inner hero again, and go out there and make a mark on the world.
Good inspiration for this guy could be like
-Tokusatsu (Power rangers for example, but definitely viewtiful joe series, which lampoons the idea)
-Cape and Mask superhero comic books(the campier the better)
-Anime with passionate MC's (Gurren Laggan comes to mind with spiral power being similar to the "inner hero")
You could definitely market Cleric powers as something that everyone can do (they can), and as having the discipline of faith. For Courage and glory in particular, it is about having faith in yourself to do what you need to do, and faith that others will recognize your deeds. And also faith in the ideas themselves.
That strong belief and willpower can make miracles happen, and a hero is someone who turns bad situations into miracles, no?
A buff is just focusing your faith deep inside and pulling out what you need, or when you aren't doing it yourself it can just be your presence pulling out that quality of another.
A divination is just the power of positive thinking and insight showing you the way.
Miracle[the spell], well that is VERY VERY magical, but this kind of magic comes from believing so hard that something just has to make it so.
Two words explain the cleric. Faith and Discipline. Those are also two words that explain a hero.