Japan has got to enjoy Mega Man: Dr. Wily's Revenge since the 3DS eShop launched back in June, but the rest of us have had to wait. But at least Europeans have some confirmation now. A release schedule from Nintendo of Europe pegs Dr. Wily's Revenge as releasing on the eShop's Virtual Console September 15th. I've yet to find any correlating schedule for a North America release, and I don't think there's any pattern surrounding when Europe gets games compared to other regions. At the very least, though, it was trademarked, so it will be coming at some point.
Thanks for the tip, rockman!