Only Fractal knows and they’re unlikely to say as it’s not in the best interest for a company to reveal such things.
My best guess is soon. Historically speaking Fractal does not sit around. The fact that the bigger strips have already appeared on the new FM3's is very telling. Sure, there are a few factors we do not know e.g., how many, current style units they have and need to move before releasing the new and improved version, etc.. If I had to venture a guess, I would say before the end of the year give or take a few months. And again, if history is any predictor of the future, there will likely be a few additional updates to the FM9 Turbo "MKII" as well. Should be a very nice update. If you are not in a big hurry, it would be well worth waiting.
We have this, straight from the horse’s mouth...
Since the FC Mk II versions were announced, we've said that we want to bring the new displays to the whole family. But in the current manufacturing world of shortages and setbacks, it's a challenge.... and a few new gray hairs were earned in getting to this new version. Any chance of an FM9 Mk II is still quite farther out.