Platform sharing & other activities are not completely separate. Fiat owns Chrysler... yet Chrysler, Dodge, Jeep, Mopar,Ram, & SRT all have individual leaders & marketing VPs that answer to Fiat back in Italy. I'm sure if the Viper returns to racing... Fiat will work with Chrysler's SRT to promote the "Italian" bits of the new V-10 powered snake car.
My point is Hyundai probably is briefed of Kia's motorsport plans too. As you wish not to split hairs... I will now drop this.