The eldest Charmed sister (Prue) shall give birth to two children, a daughter and a son. Both children will be half whitelighter, on their father's side. While the son will be just a normal witch, the daughter shall weild great power, along with her 'sister witches' (female cousins).

The middle sister (Piper) shall have three children, two sons and one daughter. All three of these children will be half whitelighter. Only the daughter will practice witchcraft. The two sons shall be second generation whitelighters. Should the whitelighters choose to be witches, they, along with their sister, will form a new Power of Three, though it will not be as strong as the original (their mother and her sisters). However, it is highly unlikely this will ever happen.

The youngest Charmed sister (Phoebe) shall have two children, a son and a daughter, by the Source. The son will live in the Underworld to train to be the Source's heir. The daughter will live with her mother on Earth until she is old enough to decide for herself whether or not she wants to be a Good Witch or an Evil Demon.

The Source will have another son, though not with the Halliwell witch. This will put his daughter in a difficult position. She will have to choose between remaining on Earth with her mother and cousins, or going down to the Underworld with her father and brothers.

Should she choose to be Good, the three 'sister witches' will be The Next Generation Charmed Ones. They will be more powerful than the original Power of Three, making them almost invincible. In addition, each of the new Charmed Ones shall receive one of the four Elemental Powers: Earth, Wind, Fire, or Water.

Should she choose to be with her brothers, they will create an Evil Power of Three. It will be an unstoppable force of pure evil, that which not even the Charmed Ones themselves will be able to control. However, no one will receive any Elemental Powers.

This decision cannot be forced by anyone. She will have to make it on her 16th birthday. When she chooses a side, she will seal her fate by either murdering an innocent, or vanquishing either The Source or one of his heirs. If she doesn't make a decision by midnight, her powers will be stripped forever.