i just remembered this idea from many years ago, but im surprised not to see a thread about this yet.
as you remember, before the German invasion of Europe in 1940, many countries ordered new equipment to rearm its outdated armed forces. however, most of it never got delivered before they surrendered. so the idea is "what if they did?".
if the German Blitzkrieg could have been holded up until 1941, they could have had theyre hands full fighting Curtis Hawk 75, P-40's, Spitfire MkI, Hurrican Mk.I, P-39's....from various nations and not just those of France and Britain.
this GB could not be limited to planes, but also ships, armour,....