A very ambitious project on a highly interesting, yet really underrepresented scenario. Possibly since it is technically still going on.
Anyway, the scale of this projects also worries me. It is good that you have experience in modding. But why then post an announcement without something to show for, maybe something that can get people on board, since this will probably require more than one Dev at some point. How about at least some quality graphics, designs, detailed plans in picture form, some proff of concept other than a page worth of text? Don't take this as a discouragement, but I have seen too many projects starting like this and dying within weeks, once the motivation drops off.
You also plan ahead a lot, aiming at bringing multiple factions on the field, air assets, covering different time periods at once. Try to focus, keep the expectations at bay, meet them, then grow in scale.