Yes
If prince William does not accept then either his son will be king or there will not be any king
When Charles passes, Prince William will become King. Prince William is the next in line afer Charles. However, Queen Elizabeth is currently still on the throne.
Prince Charles, assuming he is still alive (otherwise the throne will be passed down to Prince William, then Prince Harry and so on)
After King Charles, Prince William is next in line for the British throne. King Charles is Prince William's father.
William's godfather is King Constantine II of Greece.
No. It is true that, if and when Prince Charles becomes king, Camilla, Duchess of Cornwall, will legally be the queen consort. Still, she is not and will not be in the line of succession to the British throne. So when Prince Charles dies, Prince William will be become king, and Camilla will never be queen regnant.
She would abdicate in favour of Prince Charles becoming king. If Prince Charles refused, then the roll would become the responsibility of Prince William.
It is likely that Prince William will become King after his father, Prince Charles.
If Prince William has a son while his grandmother the Queen is still alive the child will take Prince Harry's place as third in line to the throne. Probably after many years he would become Prince of Wales and eventually King.
Prince George (born July 22, 2013) is third in line. As of 2016, the line is through Prince Charles (oldest son) to Prince William (oldest son) to Prince William's children (George and Charlotte). They would be followed by Prince Harry (William's younger brother), then Prince Andrew, Duke of York (younger brother of Charles) and Andrew's daughters Princess Beatrice and Princess Eugenie.
If Prince William is alive after the death of his Grandmother Queen Elizabeth II and his Father Prince Charles he will become King.
Prince William does not give his email or email ID out to the general public. Prince William is the future King of England.