I don't know if this will amount to anything, but I figured it was worth a try. I created a petition on Change.org to try to sway Ubisoft to release Myst III and Myst IV rights back to Cyan. I don't have a lot of friends, and I'm not good at promoting things, so if you think this is worth doing, please share it with some people.
And if anyone from Cyan is reading this, if this in any way interferes with your own efforts, or you feel like the language needs to change, or the whole thing simply deleted, please let me know. I don't claim to represent you, or know anything about how any of this works. But these are two great games that deserve to be made available to people again.