Something I don't understand, but why don't they take the Chevy Bolt chassis and turn it into a PHEV Crossover a la Kia Niro? They already have the platform developed, and crossovers seem to be all the rage.
http://carsalesbase.com/global-car-sales-2017/
Aside from the sedan question per-se, it's interesting to me see tastes change so rapidly.