Although most details are still unknown, we heard that the AMD Picasso APU is a 12 nm Zen+ chip that might launch as an individual family of products instead of a mere Raven Ridge refresh. Unfortunately, AMD's current roadmap mentioned a 2019 release date, so it will probably take at least a few good months until more official details show up.
https://www.notebookcheck.net/Upcoming-12-nm-AMD-Picasso-APU-spotted-online.317706.0.html