The popular fictional Buffyverse established by TV series, Buffy the Vampire Slayer and Angel has led to attempts to develop more commercially viable programs set in the fictional 'Buffyverse'. However some of these projects remain undeveloped for various reasons: sometimes, vital cast members may be unavailable; alternatively, studios and networks which would provide capital for the spinoffs might remain unconvinced that such projects are financially viable.
From 2007 onwards, many ideas for unproduced Buffy spin-offs found their way into canonical comic books. Ideas for Faith were utilised in Dark Horse Comics' Buffy the Vampire Slayer Season Eight; ideas for Spike featured in IDW Publishing's Angel: After the Fall; and characters and plotlines developed for Ripper were adapted for Dark Horse's Angel & Faith.