The Spectre
Out of all the origin stories, watching Jim Corrigan become The Spectre would be one of the most fascinating and brutal to see.
On his way to his engagement party, thugs murder hard-boiled cop Corrigan. They stuff his body in a barrel and toss it where it can never be found. If he wasn’t already having a bad day, his spirit is then denied access to the afterlife and he’s sent back to Earth to eliminate evil in supernatural fashion.
The Spectre is similar to Ghost Rider in a way because of his desire to wipe out evil, but his powers make him one of the most powerful heroes in DC’s arsenal. He can warp reality, manipulate matter an energy and has a general cosmic awareness. You absolutely don’t want to get on his bad side, or else you might wind up a nice crispy skeleton. It would be a darker show, for sure, but it could potentially rival everything happening over on Netflix.