The Ryzen 5 2600, with codename ZD2600BBM68AF_38/34_Y in the SANDRA database, is meant to replace 1st generation Ryzen 5 1600. It has 6 physical cores and 12 threads, and based on the codename, is clocked at 3.4GHz (base) to 3.8GHz (boost). The upcoming chip also features 16MB of L3 cache and 3MB of L2 cache, along with a 65W TDP.
https://hothardware.com/news/amd-ryzen-5-2600-12nm-zen-cpu-asus-crosshair-vii-hero-x470-motherboard
If this leak is true, I will stay away from AMD forever and ever. I will sell my Ryzen 1700 right away. Sorry AMD.