Up until today, the last time I spoke to anyone at Yacht Club Games face to face was in April 2017. They were just finalizing their plans for King Knight's campaign, the last of the game's single-player updates. There was still a lot up in the air for them at that time, but one thing was for sure, they were not going to take a year to release this one.
Here we are about a year later and the game isn't out yet. So what's taking so long? An absurd amount of new content, that's what. Not only are the traditional 2D action-platformer parts of the game filled with new environments, enemies, and opportunities for King Knight to show off his new powers, but the all-new competitive card game portions of the campaign are enormous.
I got to play an un-timed version of the PAX East demo this morning at around 10:00am. By 11:00am, I had finally beaten Black Knight, the demo's boss. Over the course of that hour, I didn't get bored once. This "side-game" is deep and compelling, to the point where I'm worried that Yacht Club may be shooting themselves in the foot by making it entirely optional. You could sell this card stuff as a standalone game for up to $10 and I'd buy it on day one. Knowing that everyone who bought the original game in its first year of release will get this new content for free is, in a word, bananas.
via destructoid https://www.destructoid.com/shovel-knight-king-of-cards-has-a-ridiculous-amount-of-new-content-497742.phtml