Created in 1987, Castlevania is set primarily in Transylvania across various time periods and largely chronicles the conflict between the Belmonts, a family of legendary vampire-hunters, and Count Dracula. Most (but not all) of the games involve a member of the Belmont family exploring Dracula's vast and ever-changing castle in order to destroy the Count himself or, occasionally, to rescue abducted friends or retrieve some specific relic for good or evil purposes. In most instances, The Belmonts are masters of whip-based combat and often utilize a legendary chain-mace called "The Vampire Killer" as a primary weapon. Apart from featuring Dracula as antagonist, the games do no make significant reference to the original Bram Stoker incarnation of the character.
Castlevania was one of the more celebrated video game series of the 1980s and '90s, being among the first games to affect a gothic horror aesthetic and revered by vintage gaming fans for its signature graphical aesthetic and memorable music. However, with developer Konami focused more on casino and mobile gaming now, the Castlevania brand has been largely dormant for some time. Rumor now has it that the property could be making an unexpected comback in animated TV form.
The rumor has been extrapolated by IndieWire from comments made by Adventure Time producer Fred Seibert on the Nick Animation Podcast. During his appearance on the podcast, Seibert hinted at a long-gestating project at his Frederator Studios based on a classic video game franchise. Fans of sharp memory may recall an older story about Frederator having owned the adaptation rights to the Castlevania franchise for almost a decade, and it turns out that this situation remains very much in place. While nothing has been confirmed, it appears likely that this is indeed the project Seibert was alluding to.
The Castlevania video game franchise has spawned dozens of sequels, remakes and spin-offs across almost every major gaming platform and makes up half the foundation for the so-called "Metroidvania" open-world platforming genre - yet, it has long struggled to break out into other media. Simon Belmont (the main character of the original game and many of the sequels) appeared in reimagined form as a comic-relief braggart on the 1990s Nintendo crossover cartoon TV show Captain N: The Game Master, but never in his own series or in a form closer to the game's depiction.
Elsewhere, a feature film adaptation of Castlevania has been sought for many years by Resident Evil director Paul W.S. Anderson, but the project has stalled on numerous occasions and is not currently active. As for the the potential Castlevania TV show: it has not been officially announced yet, so no further details are available at this time.