Fanboy: Chrononaut
Oh, Professor William Mantlo! What will become of your effort to achieve the fame and respect fickle fate has denied you?? You had the thrill of a lifetime riding on the back of the Mantis-Cycle, and now here are three more super heroes, each intent on upstaging you! Yet who else can see beyond the veil of Time itself? Who else knows what is, what was, AND WHAT IS YET TO COME?!?
Nobody but Chrononaut, that's who.
I was really impressed that the power stunt rules worked okay in SS02: they're part of the Advanced Game that always seemed broken to me. I guess we'll have to see how that develops over time, but potentially Chrononaut has a ton of astonishing stunts up his sleeve.