A restoration of the Hohenzollern monarchy in the 1930s could well lead to this - they would not want to focus on such as Alsace-Lorraine, probably couldn't give a monkey's over Eupen-Malmedy, might save Upper Schleswig as a snack for later, and wouldn't want any ex-Habsburg territory.
What they WOULD be focused on is ex-Prussian territory, ie reuniting East Prussia with Germany proper. And Silesia was Frederick The Great's great achievement, so would have a historical-emotional impact
If a Russo-German alliance occurs, then a restored Hohenzollern monarchy (as opposed to the Nazis, not changing anything else much) could well focus entirely on Poland
Best Regards
Grey Wolf