The scenario i see in this stage:
Several attempts to breakaway right from the start that will not succeed, until a group containing, among others, maybe Rein Taramae and Eros Capecchi (the last one trying to gain some more points in the mountain ranking, or perhaps he will send a team mate to secure his jersey and nobody get too much points); more attacks right after Col du Glandon from the riders good on downhill, trying to put a healthy distance between them and the main group until the final climb arrives, so they could climb in their rhytm and maybe grab the stage win; they will catch the initial breakaway before the downhill is over and form a single group, that will be dispersed as soon as Alpe-D'Huez starts; meanwhile, in the pack, Shack will sustain an average pace relay with their 3-4 riders left in the yellow jersey group after the first kilometers of Alpe-D'Huez, and Astana will go in front even if they don't want, the natural pace difference will bring them in front; Contador, along one team mate will go ahead, Brajkovic and Menchov will stay in their wheel, Menchov attacks, but he only manages to get rid of Contador's team mate; they catch the remains of the past breakaways; Contador goes in front in the final kilometre without attacking, just his good pace, Brajkovic tries to stay near him, but he lose some time, but not the yellow jersey, stage win for Contador, who will go up one position in GC.