German Monarchy Restored in 1929?

What if Hindenburg agreed to make Wilhelm III the new Kaiser of a revived German Empire to thwart Hitler and his Nazi Party from seizing power over the Reich? It doesn't have to be Wilhelm 3, bring back Wilhelm 2, or even place another prince on the Imperial Throne of a restored Kaiseriech. What would Great Britain and France's reaction? What would be the goal of new Empire? Does the Soviet Union start WW2 in 1936 by invading Poland? American-Japanese Alliance?