One of the most common answers to "What if the Axis won WW2?" is "They couldn't, they were completely outmatched, it's honesty a miracle the war ever went as well for them as it did."
So what if the Nazis had gotten a lot less lucky than they did OTL, for example because France had more competent generals and better intel on German war plans, and managed to stop the German Blitzkrieg cold before anyone else really had a chance to get involved? Basically WW2 as we know it never actually becomes a thing.
What happens next? How does France react? Do they press for an invasion of Germany in return? How does the rest of Europe react? Does Japan still attack the US? Are we going to see a different world war break out just a few years later? If so, who against who and over what?