If that's the final lineup, I think the seemingly odd combination is a result of highlighting a diverse set of current or upcoming models all representing America. You've got two Black models, two Asian models, a Hispanic model, a trans model, and then Kaia and Bella have big social media followings and will presumably help sell the issue. I think it's an interesting crew and I'm eager to see the results.
The only thing I don't like about it so far is that this will be Kaia's THIRD American Vogue cover. She's only 19 and her career is arguably winding down, not heating up. I have to believe her June/July cover was a last minute thing after another coverstar fell through....