Basically, do these conditions create a Cold War that lasts well into the 21st century?
1. No Sino-Soviet split. Yes, that means Communist China still exists.
2. Soviet Union does better in WW2. Basically, they get all of Germany, Eastern Europe, Greece, and Yugoslavia. Whether Tito exists or not is another question altogether.
3. Soviet Union reforms in the 1970s. These reduce corruption, and prevent the system from utterly falling apart in the 80s. Specific type... I'm not sure right now. Lets just say it isn't quite the same as China's, and that it means the Soviet Union isn't going to outright fall apart in the 80s.
4. Mao dies in 1956, meaning no Great Leap Forward or Cultural Revolution. This would mean a much more economically powerful China, which would strengthen the over all Comintern here.
Keep in mind, I'm just trying to drag out the Cold War for centuries instead of decades. Trying to see if these conditions would lead to that.