Froome & Contador are the big favourites on paper with Rodriguez, but normally they should be just at round about 85%. Could still be enough. Froome will take his benefits from the time trail. But I'm not sure if it would be a good sign if he already would be in top shape that early.
Samuel Sanchez seem to reach his top form just by now. Imho he is the main candidate for the victory if he could confirm his level from the mtt yesterday at the Dauphine. He has nothing to hold back for the tour, so he could give 100%.
Also some of the decent climbers like Brajkovic, Fuglsang or Cunego could peak for this and could be able to fight for the victory against Froome&Contador not at 100%.
Taramäe or Coppel should try something as well for sure. Same goes for König who showed good climbing legs in California.
Maybe Szmyd and/or Moreno will get a long line. Altough normally they also won't be at 100% yet. Has Bretagne any dark horse in it's line-up?
Sicard I think is more a man to watch for escapes.
Vandenbrouk, Valverde, Talansky and Rolland normally will hold back for the Tour. Rolland could be ambitious enough to target a Dauphine title as success before the Tour. But he wants a Top 5 or even podium finish at the Tour this year I think? So his eyes are more on the Tour and to do good training and maybe win a stage at the Dauphine.
De Gendt didn't look that great in California. He is improving a bit, but I would be suprised if he is on a level to follow the big guns in the mountains already. A top 10 could be more realistic. With his knee problems even that would be a succes.
Caruso also is coming with decent form out of the Giro, so he should try to win a stage.
My prediction is that either Sanchez or Froome takes the victory.