This is a list of fanon series created by various users.
| Season | Name | Property |
|---|---|---|
| Post-Season 8 (alternate timeline) | The End (Again) series | Divineoverseer |
| Post-Season 5 (alternate timeline) | The Primordials | Kaestal |
| N/A | Redemption series | JL the superhuman |
| Post-Season 4 (alternate timeline) | Arch series | Blaid |
| N/A (alternate reality) | Light and Dark series Light and Dark: Bloodlines Light and Dark: Olympus Men of Letters (TV series) |
Superjokertv and FeralG5 |
| Pre-Season 1 | Damned Chronicles | |
| N/A (parallel universe) | Supernatural: Aether Series | Kingcanuck |
| Post-Season 3 (alternate timeline) | Supernatural: Beyond Boundaries | Yuka Ichinose |
| Pre-Season 1 | Supernatural: Origins | Superjokertv |
| Post-Season 8 (alternate timeline) | Supernatural: Fallen | FeralG5 |
| N/A (parallel universe) | Past Whispers | rinjy2 |
| N/A | Rising Angel Series | Anamantiumninja |
| Pre-Season 1 (alternate timeline) | Genesis of Occult | Shadedleaves |
| N/A | Darkness Rising | Holomanga |