@Hyolobrika
To be fair is was this post https://lab.nyanide.com/objects/4bc51042-9d8f-4cd9-9171-b161f210cc48 that made me look into Wikipedia for examples of inter-universe crossovers in fiction — and this is where I have found Captain Nazi, so it's probably complicated in this regard — looks like it's from the era when borrowing characters from different franchises was popular. Or something like that.