The comic adventures of "Hellboy" have yet to stop. Even after the world itself ended in the story "B.P.R.D. The Devil You Know," creator Mike Mignola and co. have kept revisiting Hellboy's world with various prequel stories.

In contrast, the original silver screen Hellboy, played by Ron Perlman and directed by Guillermo del Toro, remains in limbo. "Hellboy III" has remained a dream for almost two decades, one that's unlikely to ever become reality. Perlman has maintained he'd come back if del Toro would, but Mignola has moved the franchise into two successive (and disappointing) reboots.

What would "Hellboy III" have been like? The magical second film "Hellboy II: The Golden Army," originally included a post-credits scene to directly tease the trilogy's finale. This stinger, never filmed, would've resurrected the first films villains: Grigori Rasputin (Karel Roden), the Russian Mad Monk himself, and his cyborg assassin...