It doesn’t work that way. The queen doesn’t get to pick her successor. Inheritance follows the law of primogeniture.
I do recall a story that Brit pols threatened to discontinue the monarchy altogether unless Charles would agree to abdicate in favor of Will. Any recent stories on this?
The Queen could not attend the wedding of Charles and Camilla Parker Bowles because the church does not recognize the union. Charles will likely find himself passed over on the ground that he is not able to fulfill the duties to the church.