My prediction is more oriented on what pre-existing concepts they'll try and convert. Paizo doesn't seem to have any problem telegraphing the inspirations for their concepts, especially Archtypes. (Black Blade=Elric, Mysterious Stranger=Man with No Name, Reanimator=Reanimator, Ragechemist=Hulk, Shield Champion=Cap)
I'm thinking half the book will be Stephen King heavy, something like:
1. Carrie (telekinetic)
2. Firestarter (pyrokinetic)
3. Firestarter's Dad (Pusher/Psychic version of Charm Person/Command, but targets who succeed at the won't be immune for 24 hrs like hexes)
3. Daniel "Shining" Torrance aka Haley Joel (talking to dead people/history of touched objects)
4. Johnny "Dead Zone" Smith (psychically telling future)
Some of these have the potential for overlap. For example, 1 and 2 will probably both be options for the kineticist. I also predict there'll be some negative consquequences of overusing certain class abilities, somewhere between an Oracle's curse and the Ego of an Intelligent weapon. I'm recalling the way Firestarter went berserk or Jack Torrance succumbed to the ghosts of the Overlook and went axe-happy.
#4 might be hard to work into combat, but makes for fabulous RP potential.
At the very least there will be archeytpes that fit most of these molds almost exactly.