Could there be any new US states or territories in the Old World after WWII?
Could anything gained/liberated from Japan become a US state?
What about some formerly communist area?
This can happen any time after WWII.
POD can be before WWII, but WWII must go approximately the same way as OTL. So a POD inside the US, possibly a cultural one, would work. But anything geopolitical would be after WWII ends, or during its final months.