The wait is over. Bloodstained: Ritual of the Night will be launching 18 June 2019 on Steam, GoG, PS4 and XBox One, and on 25 June 2019 for Switch.
Bloodstained: Ritual of the Night started off as a Kickstarter project in 2015 by Koji Igarashi. It was supposed to be released in early 2017 but was delayed due to development issue.
After watching the video, I think it is worth the wait.