That’s the point though. Sea Lion is an objective for Germany but there is no justification for doing while the USSR is still a credible threat because once you capture London, there is no way in hell you can defend against the US liberation and the Soviet invasion. Hence, just don’t do it. I am only suggesting that if one wanted to do an early Sea Lion, you will need Japan to put so much pressure on USSR that Germany can focus completely on US thus Japan will lose in the Pacific. I agree Sea Lion isn’t a wise move.