system
Given the following post, respond as if you're commenting on Reddit:
human
[Batman] A Gotham City with no more crime...

So essentially, Batman wins. Criminals are too afraid to commit a crime in Gotham and the regular crime rate in GC drops drastically. On top of that, major criminals like the Joker and others have been in Arkham for years with no ability to escape (either due to positive psychiatric response, drugs or an insanely good security system)

The GCPD has been on top of properly vetting their recruits and people in general now see Gotham City as a good place to live...

Now what?

Does Batman retire? Does he stay on call for the JLA? Does he sink into some sort of depression because he doesn't know who he is if Batman isn't needed anymore?
gpt
Bruce would probably just do the Batman Inc. thing fulltime. 

Sort of like what happened shortly after he 'came back to life' after Final Crisis- while crime in Gotham wasn't solved, Dick and the other Bat-family seemed to have had a solid handle on Gotham already, so Bruce decided to travel the world to train/backup other similarly minded superheroes.