Spandau prison was in Germany. He was not held by the Soviets. The defendants in the first Nuremberg trials were held by the Western Allies. I am "trying to tell [you] he wasn't held by the Soviets."
No joke.
Spandau was in West Berlin and was controlled by Britain, France, USA and USSR. Repeated requests for the release of Hess were denied at the request of the Soviets.
Frank Marshall devised a gambit fo black in the Ruy Lopez (The Marshall Attack) with the specific intent of using it to defeat Capablanca. It was 10 years before he had the opportunity to use it against him, but whem he did Capablanca refuted it over the board the first time he saw ut!
Capablanca would be my 2nd choice behind Tal. I think you could make some great movies about them. Fact is, you could make a good movie about many of the chess legends' lives/careers.