If the benchmarks are to be believed, a 16 core part is confirmed and it smashes Zen+ in areas such as rendering.
There also appears to be a decent IPC uplift as well since the performance increase is more than two-fold. Current rumors suggest this even matches Intel’s 2000 dollar 18 core XE chip.
Computex is less than a week away and it is thought the full reveal will take place there. Even then, the Zen2’s performance might get better yet between now and the purported release in July.
Other info indicates that many 3xx and 4xx platform owners will get support for this chip, some 4xx owners may even see the 4th Gen PCIe speeds as well. This could make 2019 another exciting year for the CPU.
EDIT: The full reveal is here