Yeah sure! Would love to hear what's on your mind
Ok, this is a very different WWII, but still meets your OP, at least sorta.
1) POD is Japans invasion of Manchuria, Sep 1931. Germany, which has already been re-arming for a few years, but on a low key and much smaller basis, decided to offer their services too China, in the form of weapons, training, advisors and whatnot.
2) By the time of the Marco polo Bridge Incident, in July 1937, the Germans have helped train a number of Chinese divisions to professional level, and the German 'advisors', now consisting of two full Infantry divisions, sharply slap the Japanese back, leading to a stillborn second Sino-Japanese war.
3) Diplomatically, the Germans point out that if the Japanese attempt to use their fleet to blockade the Chinese ports, the ongoing Germans arms trade will simply off load in French Indochina and proceed overland. If the Japanese attempt too use force in a colony of France, that could lead to Japan having to fight France, and potentially Britain as well, if things were to get out of hand.
4) Using a bit of subterfuge, and playing all sides against each other, the Germans note that, if Japan were to find themselves at war with either France, Britain, or the USSR at some future date, a strong anti -communist China might be a useful ally.
5) During the 6 years between Germany's entry into China's military needs, they are rapidly rebuilding their armed forces, at least an army and an airforce. Naval buildup will not be anything like historical, rather the Germans build a vast money making merchant marine, with a great many tankers/oilers, to ensure continued trade even without bases in strategic places, both for profit in S American and SE Asian markets, and to help their ability to ship arms and ammunition in large amounts to China.
6) In a curious turn of events, small arms find their way from China into Vietnam, at first in just a small trickle, but then suddenly turn into a flood, and France is faced with a small, but fast growing insurgency, and has to start sending more and more troops to SE Asia to hold on too her Colony.
7) As France enters into her second year of costly fighting to retain her colony, fighting breaks out between the Japanese and the USSR, but then Germany intercedes, and points out that China, having been forced to fight communists in the western regions, is not happy with the USSR, and might just decide to lend a hand to the Japanese if something cannot be worked out, and Germany would really like to avoid being dragged into such a situation on the side of the Chinese/Japanese war with the USSR.
8) In fall of 1939, by a masterful stroke of chicanery, Germany manages to stop the wars in SE Asia, and talks China, Japan, and the USSR into a pact where they all agree not to fight each other for the next ten years, and in fact try to find common ground, and mutual economic advantage.
9) Back in Europe, the Germans and Soviets conclude an agreement called the Molotov–Ribbentrop Pact, and shortly there after, Poland gets a surprise, and with France having to fight an expensive and troop intensive war in SE Asia, what does the West do in response?
There we go, best I can come up with at the moment, but should be good for some interesting ideas and discussion, as the forces are not what they were in OTL, and the balance of power is different, so...
Have fun with it.