So, Persia and China are just waiting for an opportunity, Siam wants to help but is too weak at this point to jump in. The IEF and Indonesia are trying to stay out, but they might not have a choice. Baluchistan wants no part, and Germany will ignore it and hopefully for once not be involved in a world war.
I can see Venezuela doing something dumb. Maybe declaring war so as to attempt to take Commonwealth territory in the Caribbean? If the Compact manages a decisive naval victory, Commonwealth ships would be forced east... That would not end up well as Venezuela would most likely end up attacking somebody (accidental or not) that is US aligned.
Also, if Japan looks east, would they attempt to raid the Canadian coastline or attack Vancouver Island? I doubt that the latter would occur as the resources are needed elsewhere, but a quick raid to attack military targets and naval bases to try and effectively knock Canada out of the war? I don't know how much support they've given yet, and they would be a low priority compared to the Aussies, Kiwis, and South Africans.
It really depends on how the war turns. If the land battles end and resistance on mainland India is routed, that might turn the public sentiment to peace, at least a little. Unless the Compact manages to win a major victory, though, I can't imagine them going far out of their way to attack other targets and risk provoking the US. They'll focus on British possessions in the far east until then, and both sides will remain locked in a stalemate.
...Although, what are the chances of Britain staging a Doolittle type raid on the home islands? A successful attack would work wonders on morale, and with an unoccupied and friendly China to help recover men and material that survive... Might be interesting to see if they can pull this off.