I'm going to make this as brief as possible .....
It is indeed an interesting and curious move by DCS to indulge into the WW2 area of flight sims. To date WW2 sims have been well represented by Maddox & Co. and it has a very large fan base. Of course, one can always present an argument to having WW2 aircraft represented with all the bells and whistles. But, if longevity is a concern with DCS, then I think one would have to consider where the market is and where it is going.
I stop by the forum from time to time to see what's new and also, to view the activity levels of users. And to state that it has diminished, would be a understatement.
The biggest question to be asked when dealing with such a niche market {Flight sims} is whether you're presenting a product that will attract fans and increase revenue. It is my belief, {Based on my reaction to the news} that the addition of another WW2 based sim is not earth shattering enough to encourage a purchase. Sure I, like many, will probably want to see it in action, but the desire to use another developer's incarnation of "WW2 in the sky's" is just not that interesting.
I look forward to getting a peek at the offering, just to satisfy my natural curiosity. But secretly, I'll be hoping and wishing for other dev's to come on the scene with products that have an impact.
As an example, when F4 by MicroProse hit the market, it had such an impact that many joined the flight sim community, based on that product alone. That is the impact that is needed again, for I see many simmers getting lost in the sauce of products that only have temporary appeal. It is my opinion, that another WW2 item will not have any significant, long-lasting appeal .... sadly, I might add. WW2 has been done to death exponentially, and this will be represented in the sales of future products.
Best of luck & regards ....