Only issue I see is that Black Multicam isn't as popular as some as the other multicams. If you look on many sites and one such as I deal with which is Rippleind you will see both the black multicam and black atacs always on sale and discounted to clear inventory of it since they have a hard time selling it. This is due to it really is a set that is for night time operations since in fact you should not be wearing black in a wooded/desert and majority of combat settings while the standard wooded or desert patterns can still be used at night.
Multicam black was invented to make LEOs look cool, it isn’t actual camouflage in my opinion. I agree about your statement on ATACS ghost, and LE. Multicam black is pretty popular from what I’ve seen with only a few offerings of decent gear in this color. I still would suggest a limited run on this color , I am pretty certain it would sell. I would market it as limited edition ,and do a limited run on the most popular 1TG selling products. I would also love to see any ATACS options.