> Rommel and the italians probably would have taken North Africa, and with that seized control over the Suez canal.
You're an idiot. The odds of this happening are virtually zero. Quite simply, the lack of railroads in Libya, and the inability to capture ports intact, means that the DAK has to burn most of its supplies just getting to the front; they were seesawing over Tobruk, they'd never have gotten to the Suez where the British can reinforce almost infinitely and use an actual rail network to bring up supplies.
This is good reading on the subject.
dtic.mil/dtic/tr/fulltext/u2/a348413.pdf
>Without the murricans the japs could have had concentrated their efforts against Australia and India.
Without the Americans, it's extremely unlikely that Japan would go to war with Britain at all, instead preferring to consolidate their reach in China.
>Stalemate at best with the UK conceding Europe, and many of its territories.
Why would they concede any of their territories, let alone "most" of them?
>Had Dunkirk happened and the soviets weren't there, and the US weren't aiding.
And if Dunkirk "happens" and the French take away the time to reorganize their own line? Or worse, your 50% operational strength panzers get clobbered in the swampy terrain?
You might find this enlightening.
jmss.org/jmss/index.php/jmss/article/view/236
Britain was in no way reliant on U.S. trade to survive; never take back the mainland in Europe, sure, but they were nowhere near "toppling".