Some information on AMD Ryzen Pinnacle Ridge Processors and the new 400 chipsets has surfaced on an Asian website, both are indicated to launch in March already. 

So it can now be expected that AMD would release their Ryzen 2000 series / Ryzen 2 or whatever they will be called are launched in March 2018. Also, you already have seen the 400 series chipset mentioned a couple of times here on Guru3D, the interesting news is that with the proc release, a new chipset will be released as well, two actually, the prime models AMD X470 and then a more mainstream B450 series.

The "Pinnacle Ridge" processors will still be AM4 compatible yet optimized Ryzen "Summit Ridge" procs, now gaffed at a 12nm fabrication process. These processors would also work with your X370 chipset based motherboard. History learns us that die-shrinks often lead to better energy efficiency, and let's hope for some higher frequencies as well.

Here is the Asian translation of what Hermitage Akiharabara (pardon the Chinglish).

In addition, "Ryzen 2" that "Pinnacle Ridge" scheduled for early March 2018 at also the debut of the now. Simultaneously, motherboards equipped with "X470" and "B450" will be released from "AMD 400" series which is a new chipset.

AMD Ryzen Pinnacle Ridge Processors And 400 Chipset Could Launch in March