Hollow Knight is now finished as Hollow Knight: Godmaster was just released as the final chapter of the Knight's story. It was originally going to be called Gods & Glory, but they changed the name of this final update.
Explaining the reason for the name change, the developer said it's so that it "doesn’t conflict with the title of a certain mobile game, made by a very large, very powerful video game company".
Following on from the other free expansions with Lifeblood, The Grimm Troupe and Hidden Dreams here's what it's all about:
Hollow Knight: Godmaster is the final chapter of the Knight's story and the hugest content pack by far! Meet all-new characters, take on all-new quests, hunt for all-new secrets, and most of all, prepare yourself for an incredible battle to take your place once and for all amongst the gods of Hallownest!
As if I needed more excuses to jump back into this wonderful game.