This could be absolutely anything. Only thing for sure is there's gonna be a massive punch up to get in the break.
Most likely scenario - Flat start, so after much skirmishing, a bunch of strong rouleurs eventually get away, and cos there's nothing too steep towards the end, they stay away, but AF can control enough to keep VdP in yellow.
Other likely scenario - VdP gets into the break, UAE are happy with everyone in the break, all the GC faves roll in together.
Possible scenario - VdP gets in the break, so sensing a chance to weaken UAE, a fringe GC contender makes it there also, and there's no energy left to chase at that point. Maybe a Buchmann or O'Connor or Bilbao. Really spicy would be Porte or Vingegaard. UAE have to burn matches to control, and Pog gets isolated late on.
Best scenario - Break takes for ever to get away, small break eventually goes with Colbrelli, Bling or Sagan, QS decide it's close enough and worth the effort to control until the sprint, and then we hit the hills soon after with either no break, or a break close enough to bridge, and with UAE and AF already severely weakened from trying to control, all hell breaks loose.