It will replace their existing Chromecast Ultra.

According to the latest rumours, Google is working on an Android TV dongle and its first look may have been revealed in leaked images. The upcoming streaming device is expectedly the successor to the Chromecast Ultra, although it will run Android TV software and support remote control. An XDA Developers report now claims to have obtained the renders of the Android TV dongle, which is codenamed “Sabrina”. The streaming device from Google will be oblong-shaped and have a Google logo in the centre, resembling the Chromecast Ultra in many aspects.