I think it's pretty obvious who the top 4 are coming in: Tennell, Bell, Liu, Cui. After seeing what happened at Russian nationals (with 3 juniors sweeping the podium) I'm convinced that Liu coming in 1st isn't a far-fetched idea. Assuming she skates cleanly and hits her 3As, she has enough technical firepower to erase any PCS deficit she has against Tennell and Bell.
If I had my way the podium would be Bell, Tennell, Cui and Liu but who knows what will happen...