What if The Lord of the Rings had really been about World War II?
In reverse, we could play with the idea of what would have happened in WW II if it had followed the lines of LotR…
The plot would focus on the destruction of the Atom Bomb (and implicitly all knowledge required to make it) by a small team of English patriots led by George Orwell, who infiltrate Germany and destroy the evil research establishment which is making the A-bomb.
The climactic end would be the death of Hitler (as the ready-for-use prototype explodes?) and the end of the Nazi regime in Germany with the return of the Holy Roman Emperor.