We are all familiar with the "Golden Age" of comics that spanned the World War Two era. The "All-American" heroes of both Marvel and DC comics were consistent sources of memorable Allied propaganda, shown smashing Nazis and IJM on a regular basis. Many heroes were even written specifically to be military or created from a military effort, and battles villains created by Axis powers like the Red Skull or Captain Nazi.

But this source of propaganda was completely absent from any popular literature in the Axis powers, despite the fact that comics were well known across these nations for many years prior. The reason, I read on Wikipedia, is that Nazi Germany banned "all such literature", but I have no idea why they would do that?

Following in the style of Philip K. Dick, many alternate histories set in an Axis victory imagines Pro-Nazi propaganda in the form of comic superheroes, such as Blitzmensch from Wolfenstein, even though no such thing ever existed in our world. Why would the Nazis pass up on an opportunity like that to spread more propaganda, especially one that reinforces their ideology of the "Übermensch"?

What kind of propaganda popular fiction did the Nazis actually produce?