The electric Niro and Kona were held back to let them get rid of a backlog of ICE cars they had in stock, I suspect VW were doing the same.
From 2020 all manufacturers need to reduce the average co2 emissions of the range of their cars so makes sense to get rid of the fossil fueled ones first before this euro rule is enforced.
Stand by for a large increase in the number of BEVs, hybrids and very small petrol engines coming in 2020