Will there be a VST version of Sundog?

Probably there will be no VST version of Sundog in the near future.

However, using Sundog with MelodicFlow or ChordPotion is a good idea then. Personally I often create a chord progression in Sundog, drag it to my DAW, and then write the melodies using the ChordPotion (or MelodicFlow) plug-in. No need to open Sundog anymore.

There is a video available which explains the concept: https://www.youtube.com/watch?v=MSITFjUb4to

Using Sundog for chords, MelodicFlow for lead melodies, and ChordPotion for all the background melodies is what works best for me.