As I've said before, I suppose anything is possible.
I think the seeds for WW2 were planted during WW1, and I believe the root cause of WW1 was various competing forms of nationalism among the European powers which were carving out their own empires in the world. The US started forming its own empire on our side of the pond and extending it into the Pacific.
A lot of money to be made, and there were multiple factions wanting to get in on the action. That seems pretty easy and straight-forward to understand, and it would appear to be quite obvious when one looks at the situation overall.
And even in Latin America, even though those states were nominally independent, they were still under a certain degree of hegemony by the U.S., so they might just easily have become colonial territories if we wanted it that way.
I'm not sure if we'll ever really be able to come to terms with the processes which have shaped and molded the world into what it is today.
But I firmly believe that WW1 was ultimately the result of nationalism and multiple powers going full tilt in wanting to make as much money and grab as much territory and resources as they could get. But nationalism was also present in the smaller nations which didn't have empires, such as Serbia. There were also growing nationalist movements in nations which were part of other empires.
Greed and nationalism kind of go hand in hand in the sense that the privileged classes in any nation benefit from the spoils of war - as long as they're on the winning side.
And then, after WW1 and the Treaty of Versailles, everybody felt like they got screwed - and the US Senate rejected the treaty outright. Some of the rough patches were hashed out a little better at Locarno (which some might see as the early precursor to the policy of Appeasement). The US was out of the League of Nations, so it fell to Britain and France to maintain the world order. But their problem was that their empires had gotten too large and were falling out of their control. Back at home they were facing unemployment, strikes, which became even worse during the Depression. Everybody was in the crapper.
I don't know that Germany would have needed to be bribed to go to war, at least in the sense that they did want to have the boundaries returned to what they were prior to WW1. But in a larger sense, I would say a main cause of WW2 was also due to the same reason they lost both wars - a lack of oil. So, I understand your point about the Baku oil fields and why they wanted them so badly.
For much the same reason, the Japanese wanted the oil of the Dutch East Indies. Their need was especially great after the US imposed an oil embargo on them.
That's where it's hard to see where the bankers might fit into the overall global/capitalist food chain. Those who control the oil seem to be where the power may lie. Oil is the lifeblood of industry and a primary source of energy.
The sad thing about WW2 is that, whatever disputes existed at the time, they could have resolved if they were more reasonable. I think the Allies were more than reasonable at Munich, perhaps they were too reasonable to the point where their actions are castigated as appeasement. But Hitler was just too insane and rightfully seen as treacherous and dishonorable. They were operating without any sense of moral conscience or restraint whatsoever, completely beyond the pale.
It is curious, when you think about it, since Hitler obviously got support and loans from some bankers and was supported by many capitalists, both within and outside of Germany. But considering the nature of the man and the regime he was in charge of, at least from a strictly business point of view, Hitler was definitely a bad investment.