While answering questions at the TCA press gathering in Los Angeles, a number of WB's own addressed what happened this last year on CHARMED regarding Shannen Doherty's exit. The network's Jordan Levin spoke of the matter, saying, "We knew last year that there were some decisions that probably had to be made in the best interest of Aaron Spelling and his company, our company and Shannen. And everybody came to the decision that they felt was mutually beneficial for all parties involved."
When asked if the season finale was geared crafted in order to set up the entrance of a replacement for Doherty, Levin says, "We had an idea that we wanted to give ourselves some flexibility."
More specifically regarding the addition of Rose McGowan to the cast, Levin adds, "There's a history within the mythology that there could be another sister because of the Lighter. We're still sort of hammering that out, and we haven't heard the full pitch yet and how that's going to work. But we're looking to bring in someone who could provide some conflict within the group and someone who could bring a younger audience into the show. We feel like Rose does that for us."