SCREAM 4 is on its way

"It's said that the casting process is proceeding slowly, because Craven and Dimension are not sending the script to agencies in order to protect its secrecy. With only character descriptions, actors are having a difficult time deciding whether certain roles are for them." - UHM
So as I have read from different sources the next scream movie is going to take place 10 years after the last movie. Craven: "She has been off by herself and living her own life, and she’s even written a book that has gotten a lot of critical acclaim. She’s kind of put her life back together in the course of these 10 years. But, certainly, there would be no Scream without Ghostface, so she has to confront him again, but now as a woman who has really come out the darkness of her past." Neve Campbell, Courtney Cox, and David Arquette will return. It is said that the movie will also introduce a group of new cast - Lake Bell, a police officer who knew Sidney Prescott in high school - Ashley Greene plays the role of Sidney's cousin, while Hayden Panettiere plays the role of her best friend. The new cast will carry on till the next two sequels.