Don't bet the mortgage on it. NATO was configured as a defensive alliance. Any attack on A MEMBER STATE was as an attack on all. But Poland was NOT a member state. Can you imagine France or the Benelux countries joining the US in a war to drive Russians out of Poland?! And West Germany would have had a hard time joining in; her armies would have to march through EAST Germany to reach the Polish border. I don't the ca. 400,000 soviet troops in East Germany and 150,000 or so East German NVA troops would have simply moved out of the way.
"400,000 soviet troops in East Germany and 150,000 or so East German NVA troops would have simply moved out of the way."
In fact they might have been marching/panzering west.
The East Germans' might have, or more correctly stayed out of the way. They had no love for the Soviets (or the Poles) and wouldn't want to mess up what they had (best economy in the Soviet Block, or close to it) to save the Polish communist's bacon.