It doesn't mean anything. He's just referring to him as "The Batman"
Agreed. I don't think how the hero is referred to is indicative of any particular themes or motifs. But what calling him 'the Batman' undoubtedly achieves is a realistic portrayal of a mythical vigilante. 'The Batman' makes him an entity and a public figure. 'Batman' makes him a superhero celebrity.
And I don't think anybody wants to see Batman behaving like a celebrity again, do we?
So let's roll with this, if anyone cares any more. The villians call him 'the Batman' which means he has fulfilled his purpose of becoming a legend and striking fear in the hearts of his enemies. But why don't anyone who is good call him 'the Batman'? Shouldn't they view him as a legend and recognize him as some one more that just trying to be famous? I just think it's interesting how the vilians view him as this 'entity' and refer to him as 'the Batman' while all of those who have nothing to fear about him simply call him 'Batman' a name which he gave himself to his enemies.
If you think it's a stupid topic, just don't post anything. No one is making you waste your time except yourself. Unless you have nothing better to do while at work or studying, then I guess I can't blame you. I've been there myself.