Sadly, Skybound Games have confirmed that they are no longer cooperating with Team Cherry and, as a result, Hollow Knight's release has been canceled.

The main reason appears to be the lack of resources (at least that's what was reported).

Here's what Team Cherry said officially: "As a team of 3 people still in intensive production of Hollow Knight, taking the game into the retail space (even with the extensive assistance of Skybound) proved more work than we could reasonably manage,' said Team Cherry. 'In future [sic] we will investigate other ways to deliver physical versions of Hollow Knight, though likely that will be in smaller quantities".

Hollow Knight is available on PC, PS4, Nintendo Switch, and Xbox One.