I read about the existence of another universe for Batman where Bruce Wayne dies. To avenge his death, his father turns into Batman, and his mom turns into the Joker.
Which comics feature these stories?
This version of Thomas Wayne was invented for the Flashpoint series, DC’s prelude to its “New 52” relaunch, in which an alternate universe is created when the Flash jiggles a whole lot (give or take; I’m not really a DC guy).
I think the Batman parts of the story are mainly featured in:
(Although I’m pretty much just going by Wikipedia’s Flashpoint article).