Apparently, there will technically be two generations of Wranglers on sale for the 2018 model year, and current gen '18 Wrangler and Wrangler Unlimited models are now being sold as Wrangler JK and Wrangler Unlimited JK, listed on the window sticker, as well as the model name marking on the side now reading WRANGLER JK.

www.jeep.com/2018/wrangler-jk.html