So, the main problem (tell me if I’m right) is that America can block. If they do, they have an extra turn to build defensively, and this whole thing wouldn’t work.
On the Pacific side, the best case scenario for Japan 2nd turn (after they control Hawaii) is that America doesn’t block Japan from Panama. If they miss that (which a good player wouldn’t), then go for it! If they don’t, and the plan is to do all the attacking on the 4th turn, then why couldn’t Japan’s “back up plan” be to just move to a sz adjacent to sz 10, so that on turn 4 they attack W. USA?
On the Atlantic side, America has 1 ship that can block Germany (and possibly Italy if they can) from sz 91. They need two ships to block from sz 91, and presumably they would have bought another one. However, if Gib is taken G2, then Italy could bring its str bomber over I2, so that I3 it could run out and can open the way for Germany, correct?
Wouldn’t this “fix” the problems? Of course, if the American player was planning on this, it would be certain to fail, but most people don’t plan on KAF.