If Vingegaard is not fading the second half of the Tour (against all sporting and scientific insights), after his forced recovery and (too) small physical basis, then we can assume that he will become stronger and stronger. Normally, Pogacar should also fade a bit, due to his fatigue after participating and winning the Giro.
But, the same as Vingegaard. If/when Pogacar "against all sporting and scientific insights" will not fade (a bit) the last week (using the same legal scientific methods), both riders will be at the same level. Pogacar has a time advantage at the moment. So, without a breakdown of Pogacar, Vingegaard will have to attack. Maybe not once or twice, but several times. But then, Vingegaard could also run on a counter. Not being helped by his teammates (only Jorgenson not too far).
Although Evenepoel is better than expected, I don't believe he will be able to fight for GC. But he could still play a role during one stage. Helping one of the favorites (Pogacar ?) when Vingegaard fading, or by staying in the wheel (of Vingegaard, as a revenge).