How about develop P-8 Poseidon base on B737?
There are many players who enjoy both DCS and MSFS or X-plane.
B737 is loved very very much from airline users and there are so much data and models so it will be not so hard to develop I think.
I saw many gamers who are eager to transit to DCS from airline.
And I saw many C2 Tactical Controllers who enjoyed theater controlling.
So I think it will be one of the good way to them.