After the collapse of the Soviet Union, Cuba lost its supporter. A bad economy and examples of collapsed dictatorships all over the world do not promise sustainability for the Cuban communist regime. However, for this to happen Taiwan will have to give up its sovereignty, which for Taiwan means surrender. Thus, unless China will soften its politics toward Taiwan, rapprochement probably will not happen. Instead of pressing China to improve relationships with Taiwan, the collapse of the Soviet Union made reunification less attractive.
Reunification can damage China's internal security.
The status quo might be the best alternative for now. The Future Rivalries produced by the Cold War bipolarity will dwindle, because their source is gone. However, with the emergence of the new states, new conflicts will surface. Adversaries will eventually start seeking improvement of their relations and the principles of icebreaking presented in this study, based on successful rapprochement's of the past, will be very helpful for them.