I think we may well see an aero replacement - but it will be in the same price range as the Aeromax / supersports.
With the current factory I don't see that there is capacity to build a third model line, and spending significant $ to add a new model that retails at the same cost as the aero, which they could happily have continued to sell with 0 investment makes no sense.
The only possiblities I see are
a) lifecar - need to make sure average emissions from morgans fall under a certain CO2 limit - so put out a limited numbers electric / hybrid car.
b) Trad finally sucumbs to regulations, and need is there to deliver classic shape on modern chassis.
Otherwise, keep building trads, and selling low volume high cost specials based on Aero 8 chassis. Achieve this by locking Matt Humpries in a 30's mansion surrounded by Art Deco furniture, posters and shiny things and watch the orders roll in.