World War 3 is not likely to happen. All of the major superpowers(USA, China, and Russia) know that war wouldn't be good for either side. More than likely, everything will be worked out without war. What good would a war with the United States do Russia? It wouldn't. They know it, you know it, we all know it. It would just kill millions of people and get us absolutely nowhere..
Oh wow... you're a genius. It must be a completely new idea that war is bad for both sides... That's why we had so much war in the past, people didn't realize that!
First this topic would be best to move to the Political and society. For his answer, even I think weird to reply to him. I think he did not went through his history book. when he was in schooling, lol. Next war will be nuclear or atomic and that would be the end of world.