Since the comic and movie have no connotation or usage connection to some city in Turkey I doubt any legitimate court would see any infringement.
I'm no lawyer though. In reading that article it looks a lot like a greedy money grab ploy. No one "used the name of their city", Batman the comic character has nothing to do with them or their country in any way. Show me the episode where it was revealed that Bruce Wayne was of Turkish descent. :D
Frivolous foriegn bullshit.
