I kinda feel like that VW maybe following a similar strategy like Toyota does with Lexus and Nissan does with Infiniti, just the other way around in that Volkswagen would potentially take the place of the "luxury brand" and Skoda would be the cheaper, but not necessarely worse option. Just like here in Europe.
Like
@YSSMAN said, Skoda could also be able to introduce the lower-end spectrum of their line up to the states in the form of the Fabia, which is a fantastic sub-compact, and maybe even the Roomster as I can't think of another brand offering anything similar, but then again I do believe that the Roomster is out-of-production even here in Europe.
But even cars like the Octavia, Yeti and Superb would make sense. They'd not neccesarely would steal sales from Volkswagen, but simply offer another alternative with the Octavia probably having the strongest competition in it's class with the Accord, Camry and so on, but then you could bring in the argument that you get the hipper styling compared to the competition, with the quality of Volkswagen but at a lower price.
I guess, we'll have to wait and see, but I do see a stark possibility for Volkswagen (and Skoda) to pull through with this strategy.