"In true Studio MDHR fashion, we aren't content for this final chapter to be anything less than our best work. Throughout development, we've challenged ourselves to put everything we learned from making Cuphead into the quality of The Delicious Last Course's animation, design, and music...
Meeting this standard has been extremely challenging for us amid the global pandemic that has affected so many of our fellow developers. Rather than compromise on our vision in response to COVID, we've made the difficult decision to push back the release of The Delicious Last Course until we are confident it will delight the Cuphead community the way we feel it should.
We know many of you have been waiting to return to the Inkwell Isles, and our goal is to make the trip back there next year as magical a truly magical one."
So far, it seems fans have been upset, but understanding: no one likes the idea of a game being delayed, but fewer people like the idea of people dying to come out with DLC faster. So, the delay makes sense.
Besides, it's not as if Cuphead fans aren't accustomed to a wait. The game is already three years old, and when it came out in 2017, it had already technically been delayed by a year by that point.
In any case, there's a halfway decent chance at this point that the Cuphead cartoon will come out before the DLC does, so there's still plenty of Cuphead to look forward to.