I wonder what is new about this engine and what makes the company believe in it.
The new thing about it is it's horsepower class. There are currently no Diesel/Jet-A1 aero engines in that range that I am aware of.
And they are eagerly awaited for retrofitting piston twins (like C421, Piper Navajo, Beech Duke) and larger singles (like Malibu or C210) of which thousands exist. With the Avgas prices going through the roof (recently I saw Avgas in Italy for 3.8 Euros/litre!) and availability getting more and more doubtful, there is a big market for such an engine!