It looks line new AirPods could near to being released. According to reports two new models of AirPods have been certified by the Bluetooth SIG (Special Interest Group) which they need to have before being released.
Rumours are these will have Bluetooth 5 support which would allow for longer battery life and better connectivity, “Hey Siri” support, and that the case would support QI wireless charging. It could be that the AirPods would be available with and without the wireless charging case which could explain the two model numbers.
No news as to when they are expected to be available, but my guess is that they would be released at the same time as the AirPower charing matt which Apple announced in September 2017 but has been delayed since. Both of these may be released in time for the holiday period, or could be held until early next year.