Celeste is getting a free 'Farewell' chapter, which was announced awhile back. Work continues on that chapter, but it seems things are close to wrapping up. Check out the full message from the official Celeste Twitter account below.
We're on the home stretch of development for Chapter 9: Farewell. It won't be out in April, but hopefully it won't be much longer. For the physical release, we decided to hold off on printing until Farewell is finished. This DLC will be a free update on all platforms!