I do think that Wagner and Gold are the one-two tandem heading into this season and I believe that the US Federation wants it that way. I wouldn't be shocked in Zhang interrupted that duo (like Wagner, she made massive improvements this past season). Anyone else would be a genuine surprise to me.
In addition, Gracie has already put down the gauntlet having shown that that she has more difficult content this year. I wrote this over on FSU:
Last year tech content (Senior - WTT)
For perspective, Ashley Wagner had the highest Jump BV at 2012 Worlds at 44.81. And at Nationals 2012, it was Angela Wang (who made a major comeback to go from 16th to8th), who had the highest Jump BV at 41.93.
Also PCS is more than whether she looks artistic or senior. She should score decently in some of the technical categories (skating skills and transitions), esp. the transitions. She has a ton of them in her programs.
As for Ashley Wagner -- she is the defending champion, so certainly she is in the mix. Also looking at her from now to back in 2010, she is definitely as fit as I've ever seen her. (She's always been pretty fit, but I'm saying she's even more so.)
Wicked Yankee Girl