Do the M3, OASYS, or Karma know about producing an intro, verse, chorus, fill, ending, etc.?
No. There are no intros, fills, variations, etc. While you can change the realtime controls, knobs, sliders and switches to produce many different variations of the initial preset, and there are multiple scenes that you can switch between, it is not conveniently set up to do these kinds of arranger functions. If this is mainly what you are interested in, you should check out the KORG PA line of Professional Arrangers.