No specialist have worked on this topic since it never happened.

However, you should rephrase your question: What was Germany's future plans for France?

The simple truth is that we do not know what would have happened had Germany won. Sure, like you say, WWII as we know it might not have happened and the Holocaust might never have happened - but at the same time, they could have happened despite everything and they could have been twice as worse.

We simply do not know.