The CW have attempted 2 Supernatural spinoffs. Bloodlines in season 9. 1 / 7
And, more recently, Wayward Sisters. But both were passed up. 2 / 7
It's inherently difficult to have a Supernatural show without Sam and Dean. 3 / 7
But next season will be Supernatural's last, and this could benefit a possible future spinoff. 4 / 7
For one, the spinoff wouldn't need to compete with the main show. 5 / 7
And viewers upset about Supernatural ending will have something to fill the void. 6 / 7
Additionally, the spinoff's story wouldn't be restricted by the main series. 7 / 7