I agree with a lot of the points you make here, but I actually think Batman will stay popular as a series and not just because of fan loyalty.

In Kill Bill the titular character does a long monologue about Superman being the real person and Clark being the made up one and is his critique on human culture. It’s a fabulous scene but I disagree with the point, Clark grew up as Clark that’s the real person.

But I do think that’s an interesting way to spin Batman, because Batman is the real person and Bruce is the act and you could and i believe they already did the most recent movie play it up as a scathing critique of capitalism, but it’s really long and I only saw it the once.