If this sim will be bought by a great number of people? I doubt it.
It is something special that only a few flightsim enthousiasts like you and me will appreciate. The big majority of general "gamers" will not bother to buy it.
It is too complicated if you want instant "fun". That is why shooters like "Call of Duty" and the like are more popular.
Anyway, I think (and hope) it will get the same support as the old IL2 had.
Still expecting planes like the FW190 the P38, P51, P47 Thunderbolt, the japanese Zero, the ME262 and so on and all the relevant maps of all the theatres of worldwar 2. So there is still a lot to do