With a POD after the establishment of UN, could you make G4 (India, Germany, Japan, Brazil) to be a stronger force than the P5 (US, UK, USSR, France, China)?
You may not have it to be a "de jure situation" (as I like to call it) reminiscent of Taiwan keeping UN seat and such. The P5 Nations must occupy the core of their nation. (I will use the term 'core' very loosely, so permanent Civil war or Korea like situation is fine)
Bonus-
G4 GDP is about 1.5 times P5
World is more advanced technologically.