Diana will never become the Queen that Camilla will become. This is poetic justice given Diana’s sin. The vain Diana wanted nothing more than to become a Queen. Even after Charles divorced her she was still kvetching to the media that she still wanted to become Queen.
Now Camilla is, of course, no better than Diana and deserves the queenhood no more than Diana. She committed the same sin and they are two peas in a pod. But the reason to take pleasure in the fact that Camilla will become Queen where Diana will never get that title she desperately wanted, is the comparative public perception and reaction to these two trollops. While the public scorned Camilla, they worshipped Diana. And what they get is a crushed Diana and a Queen Camilla.