Oh well, we happen to be working hard on this - among other things - and we're fortunate enough to have the acknowledgement of M.Fletcher while doing so, which is most precious a feeling.
For we are simply like you, in dire need of a successor and actively looking for the next game that will be worthy of this double legacy (I say double, as I'd include 1942:Pacific Air War in the package too!).
We will try to assume the mantle as well and as far as possible considering our available means! Crossing fingers!