It appears that Bose is on the verge of announcing the QuietComfort 45, its next-generation ANC headphones. The QC45 will launch in two colours for US$329, along with a revised design, USB Type-C charging and up to 24 hours of battery life.
https://www.notebookcheck.net/Bose-QuietComfort-45-pricing-leaks-with-two-colour-options-to-choose-from.555754.0.html