I’m sure everyone has their opinions on what other aircraft they would like to see in the future, so lets hear them!
For me, I’d like to see a variety of Pipers (Archer, Cherokee, Comanche, etc.), Additional Cessna’s ( I particularly favor the “180”), A healthy collection of the Vans RV series and Glasair Sportsman with tricycle, taildragger, and float variants for both. More turboprops such as the Quest Kodiak, and more twin-engine aircraft for sure! (twin-otter, twin-otter, twin-otter)
Me personally, I’d like to see more versatility in capability and form. Helicopters, sailplanes, pure floatplanes, a trike ultralight, and perhaps a pre-Jet Age vintage aircraft.
Since we already have so many contemporary GA aircraft, my favourites currently would be some older aircraft: Lockheed 10 Electra (although this could also considered to be an airliner), Messerschmitt Bf 108 Taifun, Boeing Stearman, Tiger Moth, Beech 18, Cessna T210, North American T-6 and some warbirds.
Also I am waiting impatiently for Aerosoft’s Twin Otter
They’re not well known - and rather low volume - but there was a fabulous model of the Columbia 400 (later Cessna 400 then CorvalisTT irl) released by Eaglesoft for FSX. The Columbia 400 holds the title for the fastest fixed-gear piston single. The plane is a blast to fly cross country, lands easily, and looks really great!
And of course, I would love to see my all-time favorite twin, the Cessna 337 Skymaster. I have dozens (if not hundreds) of virtual hours in that aircraft.
+1 on this too 
