I just started a game where I DOW against all allies on G1 and J1. Germany hit USSR on round one and I’m going to keep that pressure up as long as possible. Japan is somewhat spread out to make all the attacks I wanted on J1 and those battles are awaiting scramble orders.
The theory is US is like the fire station and all of a sudden two huge fires just flared up in opposite directions. If they go all out against one fire, they should be able to put it out. The trick that US will have to manage is putting enough help on BOTH fires before one fire or another becomes an unstoppable raging inferno. I don’t know how this will turn out, but at the very least it should be a fun/interesting game.