In the backstory for the show, Bruce retired as Batman after his advanced age forced him to adopt a suit of Powered Armor that nearly killed him because of the strain on his heart. Kevin Conroy's first and final live action outing as Batman came in Batwoman, where he plays an aged, paranoid Batman who relies on powered armor and ends up dying after a fight with Batwoman and Supergirl results in his suit electrocuting him. Conroy died of intestinal cancer three years later after Crisis on Infinite Earths aired.
Henry Rollins playing a quasi-suicidal Mad Bomber, after he severely hurt his reputation in 2014 with an article where he viciously insulted anyone who commits suicide, in response to Robin Williams doing it (and while he was currently on a show with Williams' daughter Zelda, to boot).
King completely forsaking Melanie/Ten (as well as hitting Jack for even mentioning her name) and cheating on his wife in "King's Ransom", unfortunately, reflects on his voice actor George Lazenby's marriage problems with tennis player Pam Shriver in August 2008 that led to a bitter divorce and custody battle that involves Lazenby's alcoholism and violence towards his young children according to the court evidence brought on by his eldest daughter Melanie.
"Last Resort" became much more relevant and frightful in current times since the ongoing controversy over teenage rehabilitation camps with a series of mistreatment and question methods on its clients.
During the earlier Batman series, Dick, Barbara, and Tim were all excited and eager to join the "Bat Family". Even going as far as to continue to fight crime despite Bruce pointing out several times that the life of a crime fighter is both dangerous and taxing. Forty years down the road, all three blame him for all their suffering, even claiming Bruce "manipulated" them into joining the fight against crime.
The hints of a past relationship between Bruce and Barbara were enough for viewers to react with Squick and No Yay. The film adaptation of Batman: The Killing Joke takes their relationship up to eleven with a Narm sex scene, which earned the film a great deal of negative criticism for prioritizing Fanservice over characterization.
Stephen Collins voiced a Monster of the Week who kidnaps his own teenage daughter for himself is more chilling considering the revelation of his real-life repeated statutory rape crimes. Also, the fact he plays an estranged family member who is driven to commit a crime by the separation is much more harrowing due to ugly divorce proceedings with his ex-wife Faye Grant that led to said crimes being made public.
In his debut episode, a flashback shows Stalker undergoing a painful back surgery with him screaming all the way, Stalker's voice actor Carl Lumbly would play Isaiah Bradley in a One-Scene Wonder in The Falcon and the Winter Soldier who was traumatized by being forcibly used as a Super-Soldier human experiment for three decades, receiving physical Scars Are Forever as a result.
When Bruce and Superman reunite in "The Call," Superman warmly tells the elderly Bruce, "You'll outlive us all, Bruce. You're too stubborn to die." This comment became much less wholesome after Kevin Conroy died in 2022.
Talia being taken over by her father is this for anyone who had even the remotest fondness for her original characterization. Damian's existence relies on no one stopping him from being raised as an assassin, meaning future retcons to her story, heck even re-imaginings will forever live in the shadow of the version of Talia that groomed her Damian into a child assassin...
Mr. Freeze originally stated in the prequel that he wanted to die due to his condition making him practically immortal. This series has him finally meet his end as a bitterly betrayed man with guilt, loneliness, and grief aplenty, which is further hammered home by the death of his voice actor, Michael Ansara, over a decade after his last performance.
— and the theater was showing The Dark Knight Rises.