Let's just say the Weimer Republic survived and Japan didn't start anything in Asia because of the European powers breathing down their neck.
What is the relationship between the USA and USSR like and how do they progress? Do they still become the superpowers wanting global dominance as in OTL? Would either of them still been as powerful?
First of all both the US/USSR are going to be weaker, both absolutely and realatively.
Without WWII decolonization takes a huge step back. The colonial powers are not exhausted, were not ejected from many of their colonies, did not have to encourage military activity on the part of native populations, ect, ect.
The US did not have all economic competitors bombed flat, did not recieve bases thoughout the world, did not build up their military to a huge degree, did not have the Manhattan project.
The USSR did not conquer half of Europe. Then again they were not a bloody battle field either.
Weilmar Germany survives?
Versallies is eventually scrapped. Rearmament will happen, but war is not inevitable.
As the USSR industrializes and arms, the concern about Germany will diminish.
As anti-imperalism spreads, aided by the sovs, the UK and France move to deal with both the rebellions and the soviets who are supporting them.
I really see, at least initially the US remaining to the side of the world stage.
WHo gets the bomb first? Germany?
THat leads to a shock. Demands of lost territory?
Race for the bomb.