Scream 2, they had only just released the first Stab film. So we're just supposed to accept that another Stab film has come and gone, depicting the events of the previous Scream film? Stab gave Scream 2 the opportunity for some meta commentary on slasher films and the success of the original Scream. Stab 3 and the hijinks in this movie mostly transform Scream 3 into a parody. Also, in light of recent events and allegations, it seems pretty gross to have plot elements pertaining to a young woman being sexually abused by a Hollywood producer being used as the backstory for the latest killer.
(Image from scream.wikia.com)