And he did.
https://medium.com/@AmandaKP/how-zac...e-45ecfe806373
https://www.reddit.com/r/DC_Cinemati...ople_overcome/
Leaving aside that you ignored The New Adventures of Batman and Robin, The Batman has Batgirl and Robin, Beware The Batman features The Outsiders, Batman The Brave And The Bold is about him teaming up with virtually every superhero in the DCU and there are no less than five animated movies featuring the Batfamily extensively. This isn't even getting into video games like the Arkham series.
There is far less solo Batman content in recent decades.