As said before, we're in in Spain, and there are only three mountain top finishes, including a tough TT just before the end.
Therefore I believe the stage has Sastre written all over it. Spain, and 1/3 possibility to gain time on others. He'll start stepping it up almost at the base of the climb, and try and go full throttle till the finish. He can do it starting out so far and not do himself in for the remainder of the Tdf, because Monday is a rest day and Sunday is a ride that has escape written over it. Contador and Schleck (another one who needs to make up time given his TT) will follow. Cadel... I don't know if he can counter this type of mountain abuse. So the 3 might even work together because they can put time in on Evans...
The rest, Vandevelde, Efimkin, Kreuziger, Nibali, Schleck, Kirchen, Rogers(?), LL Sanchez (he'll take a descent somewhere to win time) I am afraid they'll have to try and limit their losses...
The stage might start with an escape, but Moncoutie (there are other stages to make much bigger KoM points), I don't know, perhaps Hivert SKL and some Euskatel boy (Igor or Mikel who is their captain? He'll wait for the climb to attack), I am even thinking of Pelli, but near the base of the climb it's my estimation, it'll give fireworks between the ones that want yellow in Paris.
or at least, I hope