A potential offshoot entitled 'Supernatural: Bloodlines' was developed last pilot season, with a back door pilot airing as part of 'Supernatural's ninth season, but the show failed to secure a pickup, reported Deadline.
"Right now, we're just looking at the white board and deciding whether there's something here that we can do," Carver said backstage at Comic-Con last weekend.
"Last year, I think it's fair to say that we went to the not-obvious version of a spinoff. There were reasons that we did that, but now we continue to kick it around and see whether there's something more there," he added.