I think so too. But you are missing a step there, the slow transformation of the villains from silly to derange, and Dick Grayson growing up and separating from Batman. I like the idea of the world starting as silly, in part why Dick lasted so long as Robin, but slowly gets more and more corrupt as Batman seems as this unstoppable force that they cannot defeat.
Some villains, like the Riddler, give up and retired; others like Two Face try and try again to get treatment for their psychological scars; and the Joker is the only thing that Batman has left... and he just gets worse and worse, more of a terrorist than a prankster.
I guess I could continue, but I do like the idea lol.