WWII air combat covers all the planes that fought in WWII.
If you start adding planes that didn't fight in WWII that are significantly better than the ones that did typically fight in WWII, all that will happen is that a lot more people will fly those and a lot fewer people will fly the planes that were most representative of the war.
What's the point of that? If you want that, why not add F-16's or space ships?