Ok I have been thinking about this in my forced time off work.
Diamond will intruduce the DA-72.
This will be a DA62 airframe with a slightly longer fuselage to have the 3 seat rows and a baggage comparttment.
Engines will be the 300 Hp Continental CD-300 diesel.
Cabin will be pressurised with a service ceiling of 25,000 ft and a cruise speed of around 250 kts. with a range of 1200nm.
This will render everything else in GA obsolete.