gaming When is the free Shovel Knight DLC coming to steam?

[TheMarkz0ne 962]

I know it's been 6 months. But I can't find any information on the challenge mode and King Knight, Plague Knight and Spectre Knight yet(Forgot Shield Knight as playable)

 

10 hours and still hooked, I'm halfway through NG+ and I want more, want to perfect dying as little as possible or preferably not die at all. The game is a blast to play and I am happy old school games are also being new at the same time. I beat Freedom Planet as well... same with that game.