WARNING: The following contains spoilers for The Next Batman: Second Son #9, by John Ridley, Travel Foreman, Norm Rapmund, Deron Bennett and Rex Lokus, on sale now.
DC's The Next Batman: Second Son puts a new spin on the Dark Knight with Jace leaving his past behind as Lucius Fox's enabled son in order to fight crime. "Future State" didn't reveal much the reason behind Jace's actions, but this precursor has revealed that a major part of it had to do with a hit-and-run that saw Tim kill Enrique Acevedo as a teen, only for his parents to cover it up.
More of the Fox family dynamic is revealed in issue #9, revealing what eventually broke Tim and painting his origin story as a warped take on Batman Begins.
The majority of Batman stories revolve around Bruce Wayne being driven by loss after his parents were killed. Their murders motivated him to train across the world to fight crime, eventually becoming Batman -- an unbreakable symbol of justice.
However, Tim's transition into Jace and subsequently, the new Batman, works the other way around. Bruce's Dark Knight was born due to the pain of losing his parents. Jace's iteration of Batman is born due to the pain inflicted by his parents. This issue highlights Tim's anger about his father covering up what his son had done, using his wealth and the media to paint the victim of Tim's hit-and-run as a debt-ridden, drunk who wandered into traffic.
The fact that Lucius sanitizes this and reframes the narrative to make Tim a victim hurts his son. When Tim is subsequently sent off to school by his parents, he vents his frustration through training. He has a militant teacher and Tim wants to do right by Enrique and help out in the world, informing his decision to become the mercenary Jace, hunting down villains all over.
In that sense, it's once more the opposite of his predecessor, as Bruce was the one seeking out mentors to train him. In Jace's case, his parents sent him away, unwittingly providing him with a way to train. The fact that they forcibly exiled him adds so much nuance because they chose to sweep the problem under the rug instead of dealing with it and giving their son what he really needed at the time.
Bruce would have given anything to have his family around because being an orphan broke him, as opposed to Tim whose parents were the ones that shattered his moral compass and ended up being the villains in his origin story. Tim's parents represent the darkness and corruption Jace is created to fight, while the Waynes were Bruce's light and hope.