"Briefly, the categorical imperative states: “Act only according to the maxim whereby you can, at the same time, will that it should become a universal law.” Whoa! That certainly describes the extreme nature of tons of the protagonists/antagonists of these various films. From Bane and Batman in The Dark Knight Rises to everyone in Inception, the idea of finding a universal truth and then applying it (sometimes forcefully) onto everyone seems to be exactly what’s at the core of all these movies."

Philosophy grad here. Absolutely none of these characters are exemplary of Kantian moral philosophy. That goes for about 99% of blockbuster heroes.

The key thing to understand is that 'universal' is a technical term in Kantian philosophy. Kant doesn't use this term to designate a relationship like that between a genus and its species, a class and its instances, or a set and its members. 'Universal' in Kant is synonymous with 'necessary', as in, "all stones necessarily fall back down to the ground if I throw them in the air." So what the categorical imperative really says is, "Live your life as if it were a force of necessity", or a more humanist formulation, "Live your life as if you were fulfilling your duty." If that sounds weird, realize that Kant doesn't think altruism qualifies as a foundation for morality because it's still based on pleasure, which for him brings us right back to egoism.

In terms of blockbusters, Watchmen's Rorschach or The Dark Knight's Joker are better approximations.