[Update #2]: Bloodstained: Ritual of the Night update has made the umbrella-wielding vampire Bloodless a playable character.
[Update]: Zangetsu has now made his way to Bloodstained alongside the rather exciting Randomizer game mode.
While Bloodstained: Ritual of the Night ended up delivering on the gameplay front, things haven't exactly been smooth sailing on the Kickstarter side of things. Multiple platforms ended up being cut entirely before launch, while some of the content that was promised either ended up being pushed to some point after release or axed entirely.
The roguelike game mode was one of these promised features, which is why I'm a bit sad to say that it will not be coming. According to the recent developer update, the roguelike gameplay style is simply incompatible with Ritual of the Night's code, especially when it comes to procedurally generating a massive castle.
Not everything is bad news, however, as the developers are planning to replace the roguelike game mode with a new Randomizer mode. As the name would suggest, the Randomizer features the same story campaign you're used to, just with a variety of parameters you can adjust to create an entirely new experience.
The one example given so far is the ability to either completely randomize items, randomize only items found in chests, or retain them as normal. If the rest of the modifiers end up being just as impactful, and somehow manage to prevent the dreaded 'soft lock' problem, I could definitely see this being a really fun way to squeeze out even more hours out of Ritual of the Night!
On a slightly different note, the Boss Revenge game mode is still under development, though it has now been delayed. Instead of launching at the same time as Zangetsu and the Randomizer, you can expect to see it as a part of the following update. When exactly that will be, I'm afraid the developers haven't announced just yet.
You can learn more about these upcoming features, as well Bloodstained: Ritual of the Night itself, over at Kickstarter.