I knew this, of course. When I was in Ankara for my study abroad, we picked out the oddly named city in Eastern Turkiye... Batman. In Turkish pronunciation, the city is actually called something like 'Buttmun'. One of a few oil-producing locations in Turkiye, apparently the resulting boom hasn't done very well for it. High crime (Gotham, anyone?) and virgin suicides there have led the mayor to try and pick fights far outside his territory in an effort to distract his constituents from dismal prospects at home. Apparently his plan is to sue the director, a Mr. Nolan, of the latest Batman movie. He claims that the beloved superhero is a copyright infringement on the name of the centuries old city. Nevermind that the current name of 'Batman' is actually just a shortening of an older, longer name.
His main complaint regarding DC Comics ownership of copyright for the Batman name is that Turks originating from the city are not allowed to name their businesses using the name of their home town. Example: a Turkish restauranteer in the German city of Wesel had named two restaurants after his home town (Batman Bar and Shish Kebap Grill, perhaps?) and was visited by employees of the production company for the new Batman movies and told he must change the name of his restaurants.
Hmm... sounds like a job for Joker.