Qualcomm is said to introduce Quick Charge 4.0 with next years flagship processor, the Snapdragon 830. It will allegedly offer 28 Watt fast charging but Google recommends Android phone manufacturers to use USB Power Delivery instead.
http://www.notebookcheck.net/Snapdragon-830-will-come-with-Quick-Charge-4-0-Google-recommends-PD.183148.0.html