The latest dev blog for Killer Queen Black reveals that the game is received a significant delay. Check out a blurb from the blog below.
We pushed our release date from Winter 2019 (Q1 2019) to Summer 2019 (Q2/Q3 2019). We want this game out as much (or more) as you do, but we're committed to only releasing it when it's ready with all the features that enable the best experience. Please checkout out our Trello Board for a list of what we're still working on!
In addition to the new features that we're working on, we need more time for marketing, media review campaigns, influencer campaigns, and console testing. These things take time, and most can only be completed once we have a release candidate that has the full feature set.