| No idea, about races, but here's my take on classes.
I agree with most people on some:
B and B are barbarian (primal) and bard (arcane).
D is clearly druid (primal).
The most likely W, I think, is "witch," a primal controller.
T is, I'm thinking, Theurge, as others have said: a divine controller.
I'd say one "S" is probably Sorcerer. It was mentioned in Races and Classes, and it's probably arcane.
My bet on the others:
"S" is Shadowcaster - a new take on Ari's work for Tome of Magic.
"I" is Illusionist.
So now we have some extra "old power sources" - one arcane and one divine, and two new power sources: Primal and Shadow.
3 primal
2 shadow
2 arcane
1 divine
That almost matches the PHB in format. Then PHB 3 can give us a couple more from earlier sources and introduce one or two new ones, like Ki, Psionics, or Elemental.
But I'm just guessing. | 
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