I think it would be a great idea, but I think I would prefer a mini campaign for several warbirds instead of a singular one. Maybe to make it more thematic, have it only the American planes. The send off to the theater of war is the transition into one of your combat campaigns.
I would be most interested in learning the engine management techniques of the P47 and F4U. The P51 spoils with its simplicity because of the auto cooling.