If you were hoping for a classy new Volca from NAMM, Korg has decided to hit on the last classic piece of synth heritage-- FM synthesis. No sounds are out yet, but it looks like the Volca FM will be 3 voices and have 6 operators. The Volca FM features familiar sliders to the left, a standard Volca keyboard, and some basic function knobs. Perhaps Korg is planning an app like the Sampler's to program as well. There also appears to be a retro seven segment display at the top left of the unit. I'll update this post with sounds as they become available.
Update: Interview with the Volca FM creator below.