Read this article about the endless slate of horror movie sequels Hollywood pumps out. The horror and action genres have always been more franchise-oriented than other genres; today it seems excessive that even successful comedies and dramas need to be spun out into trilogies.
And Mental Floss catalogs some of Stephen King’s unpublished work — mostly why it remains unpublished, and the reasons Steve doesn’t want it to see the light of day. A couple of these I hadn’t heard of before, while others have acquired almost mythic status over the decades (Last Dangerous Visions, anyone?).