I have a partial listing here from the press release. Some of these shows aired on other networks from NBC, so there really is hope:
Chiller will feature classic horror films and television shows around the clock. At launch, the programming slate will include the television series "Friday the 13th," "Twin Peaks," "Alfred Hitchcock Presents" and "Tales from the Crypt." Feature films in rotation will include "The Shining," Alfred Hitchcock's "Psycho" and "The Birds," "Sphere," The Stephen King mini-series "The Langoliers," "Blade Runner," "Believe," "The Crew" and "The Unholy."
Here's an example: Stephen King's mini-series, when they debut, are exclusive to ABC. I also believe "Twin Peaks" was on CBS. "Tales from the Crypt," as I recall, was a syndicated show which aired on what was then (in my neck of the woods) WPIX, which became the WB.