Not to put too fine a point on it, but Batman is explicitly fascist.
I think it's more insidious than that: he's a liberal. He's the liberal fantasy about consequence free legitimate violence, an enforcer of the status quo who always takes the bad guy alive, who never goes after innocent people, and who also works within the system via private charity, and he gets contrasted with overtly fascist villains like the League of Shadows whose worldview he fundamentally agrees with but whose methods stray outside what is politely acceptable for liberals to endorse.
I think it's more insidious than that: he's a liberal. He's the liberal fantasy about consequence free legitimate violence, an enforcer of the status quo who always takes the bad guy alive, who never goes after innocent people, and who also works within the system via private charity, and he gets contrasted with overtly fascist villains like the League of Shadows whose worldview he fundamentally agrees with but whose methods stray outside what is politely acceptable for liberals to endorse.