The far east seems more likely to explode. If you have been following the news going on in that region.
China/Taiwan vs Japan (Islands)
Hong Kong vs China (British Hong Kong flag and related anti-PRC demonstrations)
South Korea vs North Korea (Missiles)
Japan vs North Korea (Military threats)
If a war was to break out in the far east it wouldn't take long to get to world war status as America will be pulled into any war involving Japan or South Korea.