Your next chapter needs an action, not an announcement.

Announcing a change produces most of the social reward of making one, which is precisely why it so often substitutes for it. The announcement discharges the pressure that would otherwise drive the work. Acting first, quietly, keeps that pressure intact.

Before telling anyone about the next chapter, do one real thing in its direction. Let the action precede the description. If you never announce it at all, it will still have happened.