I wonder what Korea is like in the ID4 universe and also Israel. Both Seoul and Pyongyang were hit in the first attack. Too bad for all those monuments in Pyongyang and especially the Kim Il Sung Mausoleum. One would wonder how Netanyahu would cope with final Mideast peace. Osama Bin Laden was alive during the first attack and I guess Al Qaida would either be out of a job or become part of the new United Earth Military as commandos against the aliens? Any ideas and comments?
I have a feeling that the Earth is supposed to have become a world peace utopia. The survivors of Earth's various militaries have combined to form a common defense force for the nest upcoming alien invasion.
Korea is probably reunited in the new movie's timeline out of necessity. Not enough Koreans left to inhabit two separate countries. I would say the North Koreans probably fled into China and South Korea once Pyongyang was destroyed and the Dear Leader didn't stop the alien invasion. I can't see the North Koreans being that brainwashed that they would continue to man the border with giant Alien ships blowing everything up. Once the war is over I can't see the Kim regime restoring order. The Dear Leader is most likely dead.
Israel way exist more as a city state. Jewish Israelis would simply go back to living in fortified Kibbutz-style settlements. You may have a coalition government of Arabs and Jews running the nation. Old timers like Netanyahu would still talk about the old days of being on guard against the Arabs. I think secular Arabs would move to the new Israel but you would still have fundamentalists out there. Perhaps a ISIS style state exists in this ID4 universe. If Osama Bin Laden is alive then fundamentalist Arabs of his type will now be preaching that the alien war was punishment from God.