We don't really know anything about this car yet, other than it has the codename SK EV.
InsideEVs has published some rumours - New Kia Soul EV To Ride On Kona Platform, Go 186 Miles Per Charge
But these seem to based on a mistranslation of a Korean news article - 기아차, 신형 쏘울 '몸집' 키운다…美 전략형 모델 육성
What it says suggests the entire Soul range will be updated onto a bigger frame.
The comment about the EV's range is -Kia Strengthens New Soul " Bigger " -
Kia Motors will change the concept of its third generation " Soul (SK 3), " which will be released later this year, from a cross-over utility vehicle (CUV) to a sports utility vehicle (SUV).
In addition to models of internal combustion engines, such as gasoline and diesel, the new Soul will also be introduced as electric cars that significantly increase its range. The new Soul EV is expected to share next-generation battery system modules with the Kona, EV and N iro EV, which are about to be released this year, to secure a range of more than 300km.
There is nothing about the new Kia Soul EV riding on the Kona Platform.
There isn't anything else in the Korean press that explains what is coming. We will know more by the middle of the year.
Edit: I removed a sentence because it was wrong. The Kona does come in gasoline and EV versions.