Here are my assumptions:
Direct injection
Double overhead cam
Variable valve timing
Dry sump oiling
CR in the 11-12:1 range
GenV is the next designator with the LS1/LS6 GenIII, LS3/L99 Gen IV, this is the GenV.
More diesels are coming, but the US is diesel adverse in mainstream passenher cars while europe is miles ahead....but they are coming.
And no, I dont work at GM.....but have friends.
Gasoline engine that can run on 87 to 93 depending on the platform it is used in.