Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | Morbius | 2022 | |
| Writer | Ghost Rider - Spirito di vendetta | 2012 | |
| Writer | Conan il distruttore | 1984 | |
| Writer | Fire and Ice - Fuoco e ghiaccio | 1983 | |
| Writer | Yado | 1985 | |
| Actor | Marvel's Captain America: 75 Heroic Years | 2016 | Himself |
| Actor | Batman & Bill | 2017 | Himself |
| Actor | Batman and Me: A Devotion to Destiny, the Bob Kane Story | 2008 | Roy Thomas |
| Writer | Red Sonja | 2025 |