Bloodstained: Ritual of the Night is a new "Igavania" (basically what most people call Metroidvania) from IGA aka Koji Igarashi. For those that don't know IGA has worked on a number of Castlevania games including Symphony of the Night (as an Assistant Director, Programmer, and Scenario Writer) and almost every Castlevania game made since then (except the most recent ones). IGA states that he is crowd funding this game because the publishers (i.e. Konami) don't believe that there is a market for this type of game anymore.
The Kickstarter launched today and has already blown past its funding goal (might even double it before the end of the first day) and is currently planned for release on Xbox One, PS4, and Steam (Mac, PC, and Linux crossplay).
The game will be 2.5D (2D gameplay with 3D graphics) and powered by Unreal Engine 4. Game is still in the early concept stages.