My conspiracy theory is that they are putting 200X heads on hold because they want to do variants in the future. Toyguru has already hinted at a possible 200X King Hisss. It is much more profitable to make fans buy a whole new figure than offering extra heads and accessories. This is purely a collector line and there seems to be a lot of demand for modernized heads yet they won't do them but the occasional hint is thrown in every now and then that they are considering a variant. Specially since they want to keep the line going for a ridiculous amount of time.
So if my conspiracy theory is true, a possible 200X Leech could happen.