- Big Name Fan: Kat Dennings has repeatedly expressed her love of Hack/Slash and wants to be in the film version.
- Recycled Script: According to Tim Seeley, the basic concept of the first Hack/Slash story "Euthenised" was originally pitched by him as a plot for an Army Of Darkness comic, and "Super Sidekick Sleepover Slaughter" was originally written as a pitch for a Slasher Movie parody featuring Marvel Universe teen superheroes.
- What Could Have Been: Notes by Tim Seeley in the final collection reveal that both Cat and Pooch were intended to die in their initial appearances. The first "Trailers" one-shot included a number of short stories and teasers that were supposedly intended to be expanded into full-length arcs: the only one which did undergo this was "Tub Club". (A story called "Dead Celebrities" was later published, but had no similarity to the "Trailers" version except the title.)