Publishing microcode ? What are you smoking ?
That will simply never happen, no more than Google will publish its Page Rank system or FaceBook will publish anything at all.
1) Microcode is how everything can actually happen, and it is the equivalent of the Crown Jewels. It is the reason a processor does what it does, and you do not want your competition to see what you are doing or how you are doing it.
2) Microcode is difficult to grep, and there are not all that many eyes available to check it out - plus, most of those eyes are working for the competition anyway.