There is the distinct possibility of a military coup in the US to genuinely try and restore order. South America is a hotbed of spies etc. Moslem anti-Nazi insurgents are common in the Middle East and western Asia. The Axis 'jointly' owns Middle Eastern oil. Siberia is not cut off, although rail and major road links are severed.
Japanese control goes into the eastern corner of Mongolia.
The war between Japan and China also enhanced and extended by supers. The parts of China not held by Japanese have mostly reverted to warlordism. The Japanese have invaded India, but not yet taken all of it. Those bits they have taken are still mainly in turmoil. British forces are still fighting a guerrilla war against the Japanese in southern India and SE Asia.