There's a comic run that's basically that called White Knight. I haven't read it, but from what I remember from hearing about it is that (spoilers in case anyone wants to read it)
spoiler
Batman is getting more and more violent and erratic as time goes on, eventually catching the Joker in a car chase that nearly kills multiple bystanders, who gives up and decides to let Batman take him to Arkham. Instead, Batman forces the joker to swallow a bottle of pills that Joker has in full view of the public and on camera, which puts him in the hospital. Joker wakes up apparently cured and not the joker anymore, but aware of what Batman did, so he wins a legal case with the help of lawyer Harley against the Gotham police for not interfering and runs for Gotham city council on the platform of stopping Batman by helping the poor of Gotham, and it's discovered that Bruce Wayne's billionaire buddies are directly profiting from Batman by buying up all the property he destroys for cheap
I don't know much else, how good it is, or how it ends. I just remember hearing about the plot and finding it interesting. I might give it a read if I see it around.
There's a comic run that's basically that called White Knight. I haven't read it, but from what I remember from hearing about it is that (spoilers in case anyone wants to read it)
spoiler
Batman is getting more and more violent and erratic as time goes on, eventually catching the Joker in a car chase that nearly kills multiple bystanders, who gives up and decides to let Batman take him to Arkham. Instead, Batman forces the joker to swallow a bottle of pills that Joker has in full view of the public and on camera, which puts him in the hospital. Joker wakes up apparently cured and not the joker anymore, but aware of what Batman did, so he wins a legal case with the help of lawyer Harley against the Gotham police for not interfering and runs for Gotham city council on the platform of stopping Batman by helping the poor of Gotham, and it's discovered that Bruce Wayne's billionaire buddies are directly profiting from Batman by buying up all the property he destroys for cheap
I don't know much else, how good it is, or how it ends. I just remember hearing about the plot and finding it interesting. I might give it a read if I see it around.
I've heard of this but didn't know what it was about. Sounds really interesting
It has since come out as a paperback of the same name. I couldn't find a digital copy of it online, though.
There's a newer run called Curse of the White Knight, and White Night Presents: Harley Quinn, both also available in paperback.
Awesome, I'll have to check it out. Batman: Imposter is a new series which focuses on Batman's questionable sanity as well.