SI-OC as Bruce Wayne's younger brother.
It’s a truth universally acknowledged that a man in possession of a good fortune must be in want of a crime-fighting gig. Luckily for Demetrius 'Rhys' Wayne, his parents did not write him in their will before biting the lead in Crime Alley. Not that he cares. He'd rather leave the literal ass-kicking to Bruce, who's an exhaustion coma waiting to happen.
Who would've thought the Batman needed so much handling?
ARC ONE: CHILDHOOD (Gotham)
[Buckle up, kids. We follow Rhys from his unlikely birth till his precipitated death!]