The Ceramic models for the Apple Watch will be back. Apple is going to offer one class higher over the stainless for those who are willing to pay the premium price for it. I don’t think they will offer a new color, but perhaps just a continuation of the space gray and white.
I hope so since i'm currently debating between the Ceramic and Black Stainless Steel for my next Apple Watch, which will be the Series 4 in September.