Hellboy is a character from the comic book series created by Mike Mignola, published by Dark Horse Comics, not DC or Marvel. The first film adaptation, "Hellboy," was released in 2004, directed by Guillermo del Toro, and stars Ron Perlman as the titular character. The story follows Hellboy, a demon raised by humans, as he battles supernatural threats. While Hellboy has appeared in crossover comics with other publishers, he is primarily associated with Dark Horse Comics.

"Hellboy" (2019) underperformed at the box office for several reasons. Firstly, it faced tough competition from other blockbuster films, which limited its audience. Additionally, the movie received mixed reviews from critics and audiences, with many feeling it didn't capture the charm of Guillermo del Toro's earlier adaptations. The marketing campaign was also criticized for being lackluster, failing to generate significant interest. Moreover, the film's darker tone and departure from the original source material may have alienated some fans.

In the "Hellboy" movie series, particularly in the comics on which they are based, Hellboy is not Lucifer's son. He is actually the son of the demon Azzael, summoned to Earth by the villain Grigori Rasputin during World War II. While Hellboy has ties to dark forces and his origins are steeped in demonic lore, he is not directly related to Lucifer, the archetypal fallen angel. Hellboy's character grapples with his destiny and the potential for evil, but he ultimately fights for the side of good.

Ron Perlman did not officially quit playing Hellboy; rather, he expressed disappointment over the lack of a third film in the original series directed by Guillermo del Toro. After del Toro's vision for a conclusion was not realized, Perlman indicated he was unlikely to reprise the role. Ultimately, the franchise was rebooted in 2019 with a new film featuring David Harbour as Hellboy. Perlman's commitment to the character remains strong, but he has stated that the circumstances did not align for him to return.