Bart has recovered what he was missing, but he's going to do it as a precaution. I'd prefer NOT close sponsors, because he'd forget until the last minute and grab people off the street.

Things that might be similar/different:
Teenaged male
Red hair
Yellow eyes
Metahuman by birth
Time/space traveller
Has beaten Battletoads

So as to not complicate things, I'm not offering his status as an only child.