What if Nazi Germany had the aid of the gods of the Vikings?
The short answer would be, the Allies are screwed. Even with the aid of Loki.
There are no Marvel superheroes in this novella. In fact, there are no superheroes of any kind. There are several super-BEINGS, the Aesir, summoned by the Third Reich somehow to turn the tide of the war. But they’re only heroes in their own grim, dark, blood-drenched set of rules.
The Third Reich Triumphant (or almost so) creates a very relateable sense of impending doom which fits the Norse mythos perfectly. And like Poul Anderson, David Brin plays fair with both elements of his story, so there are things the Aesir can do which hit the American commandoes in their soft spots … and vice versa. Who will win? Not Aesir or Allies: that one seems pretty foreordained. I mean who will win: Survival or Doom? The answer surprises everyone, not least the Norse gods themselves. Although maybe Loki saw it coming all along …