Well, without a militant Nazi Germany the whole series of events that was the turbulent 20th Century becomes unraveled. Without the conquest of France and Holland and the dangerous situation Britain faced I don't believe Japan would have even tried an invasion, although, assuming they still get cut off after Nanking it is believable that they would fight the Soviets to get the resources of Siberia, but I can't believe they would try to fight an undistracted France, Britain and Netherlands at the same time, especially when the U.S. could come in at any time. But that's just my opinion.
So, we have a possible Soviet/Japanese war in the early 40s and maybe Poland and some of the other Eastern European countries (ie Finland, Bulgaria, Rumania, Czechslovakia and maybe Turkey) allying with Japan against the Communists. Hell, maybe if it becomes an anti-communist alliance the Chinese Nationalists and Japan will stop fighting long enough to ally against the real enemy. Anyway, if that's all that happens that would probably leave the post war world pretty much like the pre-war world. The two most powerful nations will be U.S. and Britain. Maybe Germany will get back on its feat because of selling weapons to the anticommunists much like the U.S. probably would. That would mean any future conflicts would be between three power bases: the U.S. and it's allies, Japan and it's allies and Britain and it's allies.