According to series writer and producer Warren Ellis, Netflix’s Castlevania animated series will definitely get a second season this summer 2018 – which if you live in North would be around June/July.
Here’s the tweet from the man himself:
https://twitter.com/warrenellis/status/954460793814376448
The first season aired last year with four episodes, not much for the fans to sink their teeth in right? Well this time around, season 2 will double the number of episodes to 8! Huzzah!
From Gematsu.