Castlevania is a horror anime series adapted from a popular Japanese videogame by ‘Komani’ of the same name. Since the release of the 1st season in 2017, the anime has been a part of ‘in-demand’ originals on Netflix.

The anime was about to be discharged as a movie but thanks to Netflix, that it decided otherwise and released it in a series form. All the previous 3 seasons have 22 episodes with a running time of 20-23 minutes.
Release date:
The news of the upcoming season 4 was announced on 27 March 2020, and since then the fans have been waiting with sweat paws. But sadly, there is no official announcement of the release date. But anyhow, Netflix has confirmed the renewal of the series on Twitter. Netflix tweeted and confirmed the news. It is rumored that the season might be released in early 2021.
— Netflix Geeked (@NetflixGeeked) March 27, 2020
Possible cast:
All the cast can be seen from season 3 into season 4. However, some new characters might be introduced. The possible cast includes Theo James as Hector, Yasmine Al Masri as Morana, Bill Nighy as Saint Germain, James Callis as Adrian Alucard Tepes, Adetokumboh as Issac, Richard Armitage as Trevor Belmont.
Storyline:
In season 3 we saw that Dracula was falsely accused by the witchcraft and black magic, also the vampire Dracula was cursed, so there are chances that, he might return with some kind of revenge. In 4th season we can see a face-off between Trevor and Dracula. However, it is rumored that season 4 will come back with a great twist.
Trailer:
Season 4 is in the production and hence, we soon could accept the trailer. Possibilities are that the trailer might be released by the end of 2020. But due to the pandemic, it might be delayed. For further details watch the video below.